Add placeholder catalan translation file to be able to see the work in progress in further commits

src/i18n/ca.json

+{
+  "chat": {
+    "title": "Chat"
+  },
+  "features_panel": {
+    "chat": "Chat",
+    "gopher": "Gopher",
+    "media_proxy": "Media proxy",
+    "scope_options": "Scope options",
+    "text_limit": "Text limit",
+    "title": "Features",
+    "who_to_follow": "Who to follow"
+  },
+  "finder": {
+    "error_fetching_user": "Error fetching user",
+    "find_user": "Find user"
+  },
+  "general": {
+    "apply": "Apply",
+    "submit": "Submit"
+  },
+  "login": {
+    "login": "Log in",
+    "logout": "Log out",
+    "password": "Password",
+    "placeholder": "e.g. lain",
+    "register": "Register",
+    "username": "Username"
+  },
+  "nav": {
+    "chat": "Local Chat",
+    "friend_requests": "Follow Requests",
+    "mentions": "Mentions",
+    "public_tl": "Public Timeline",
+    "timeline": "Timeline",
+    "twkn": "The Whole Known Network"
+  },
+  "notifications": {
+    "broken_favorite": "Unknown status, searching for it...",
+    "favorited_you": "favorited your status",
+    "followed_you": "followed you",
+    "load_older": "Load older notifications",
+    "notifications": "Notifications",
+    "read": "Read!",
+    "repeated_you": "repeated your status"
+  },
+  "post_status": {
+    "account_not_locked_warning": "Your account is not {0}. Anyone can follow you to view your follower-only posts.",
+    "account_not_locked_warning_link": "locked",
+    "attachments_sensitive": "Mark attachments as sensitive",
+    "content_type": {
+      "plain_text": "Plain text"
+    },
+    "content_warning": "Subject (optional)",
+    "default": "Just landed in L.A.",
+    "direct_warning": "This post will only be visible to all the mentioned users.",
+    "posting": "Posting",
+    "scope": {
+      "direct": "Direct - Post to mentioned users only",
+      "private": "Followers-only - Post to followers only",
+      "public": "Public - Post to public timelines",
+      "unlisted": "Unlisted - Do not post to public timelines"
+    }
+  },
+  "registration": {
+    "bio": "Bio",
+    "email": "Email",
+    "fullname": "Display name",
+    "password_confirm": "Password confirmation",
+    "registration": "Registration",
+    "token": "Invite token"
+  },
+  "settings": {
+    "attachmentRadius": "Attachments",
+    "attachments": "Attachments",
+    "autoload": "Enable automatic loading when scrolled to the bottom",
+    "avatar": "Avatar",
+    "avatarAltRadius": "Avatars (Notifications)",
+    "avatarRadius": "Avatars",
+    "background": "Background",
+    "bio": "Bio",
+    "btnRadius": "Buttons",
+    "cBlue": "Blue (Reply, follow)",
+    "cGreen": "Green (Retweet)",
+    "cOrange": "Orange (Favorite)",
+    "cRed": "Red (Cancel)",
+    "change_password": "Change Password",
+    "change_password_error": "There was an issue changing your password.",
+    "changed_password": "Password changed successfully!",
+    "collapse_subject": "Collapse posts with subjects",
+    "confirm_new_password": "Confirm new password",
+    "current_avatar": "Your current avatar",
+    "current_password": "Current password",
+    "current_profile_banner": "Your current profile banner",
+    "data_import_export_tab": "Data Import / Export",
+    "default_vis": "Default visibility scope",
+    "delete_account": "Delete Account",
+    "delete_account_description": "Permanently delete your account and all your messages.",
+    "delete_account_error": "There was an issue deleting your account. If this persists please contact your instance administrator.",
+    "delete_account_instructions": "Type your password in the input below to confirm account deletion.",
+    "export_theme": "Save preset",
+    "filtering": "Filtering",
+    "filtering_explanation": "All statuses containing these words will be muted, one per line",
+    "follow_export": "Follow export",
+    "follow_export_button": "Export your follows to a csv file",
+    "follow_export_processing": "Processing, you'll soon be asked to download your file",
+    "follow_import": "Follow import",
+    "follow_import_error": "Error importing followers",
+    "follows_imported": "Follows imported! Processing them will take a while.",
+    "foreground": "Foreground",
+    "general": "General",
+    "hide_attachments_in_convo": "Hide attachments in conversations",
+    "hide_attachments_in_tl": "Hide attachments in timeline",
+    "import_followers_from_a_csv_file": "Import follows from a csv file",
+    "import_theme": "Load preset",
+    "inputRadius": "Input fields",
+    "instance_default": "(default: {value})",
+    "interfaceLanguage": "Interface language",
+    "invalid_theme_imported": "The selected file is not a supported Pleroma theme. No changes to your theme were made.",
+    "limited_availability": "Unavailable in your browser",
+    "links": "Links",
+    "lock_account_description": "Restrict your account to approved followers only",
+    "loop_video": "Loop videos",
+    "loop_video_silent_only": "Loop only videos without sound (i.e. Mastodon's \"gifs\")",
+    "name": "Name",
+    "name_bio": "Name & Bio",
+    "new_password": "New password",
+    "notification_visibility": "Types of notifications to show",
+    "notification_visibility_follows": "Follows",
+    "notification_visibility_likes": "Likes",
+    "notification_visibility_mentions": "Mentions",
+    "notification_visibility_repeats": "Repeats",
+    "no_rich_text_description": "Strip rich text formatting from all posts",
+    "nsfw_clickthrough": "Enable clickthrough NSFW attachment hiding",
+    "panelRadius": "Panels",
+    "pause_on_unfocused": "Pause streaming when tab is not focused",
+    "presets": "Presets",
+    "profile_background": "Profile Background",
+    "profile_banner": "Profile Banner",
+    "profile_tab": "Profile",
+    "radii_help": "Set up interface edge rounding (in pixels)",
+    "replies_in_timeline": "Replies in timeline",
+    "reply_link_preview": "Enable reply-link preview on mouse hover",
+    "reply_visibility_all": "Show all replies",
+    "reply_visibility_following": "Only show replies directed at me or users I'm following",
+    "reply_visibility_self": "Only show replies directed at me",
+    "saving_err": "Error saving settings",
+    "saving_ok": "Settings saved",
+    "security_tab": "Security",
+    "set_new_avatar": "Set new avatar",
+    "set_new_profile_background": "Set new profile background",
+    "set_new_profile_banner": "Set new profile banner",
+    "settings": "Settings",
+    "stop_gifs": "Play-on-hover GIFs",
+    "streaming": "Enable automatic streaming of new posts when scrolled to the top",
+    "text": "Text",
+    "theme": "Theme",
+    "theme_help": "Use hex color codes (#rrggbb) to customize your color theme.",
+    "tooltipRadius": "Tooltips/alerts",
+    "user_settings": "User Settings",
+    "values": {
+      "false": "no",
+      "true": "yes"
+    }
+  },
+  "timeline": {
+    "collapse": "Collapse",
+    "conversation": "Conversation",
+    "error_fetching": "Error fetching updates",
+    "load_older": "Load older statuses",
+    "no_retweet_hint": "Post is marked as followers-only or direct and cannot be repeated",
+    "repeated": "repeated",
+    "show_new": "Show new",
+    "up_to_date": "Up-to-date"
+  },
+  "user_card": {
+    "approve": "Approve",
+    "block": "Block",
+    "blocked": "Blocked!",
+    "deny": "Deny",
+    "follow": "Follow",
+    "followees": "Following",
+    "followers": "Followers",
+    "following": "Following!",
+    "follows_you": "Follows you!",
+    "mute": "Mute",
+    "muted": "Muted",
+    "per_day": "per day",
+    "remote_follow": "Remote follow",
+    "statuses": "Statuses"
+  },
+  "user_profile": {
+    "timeline_title": "User Timeline"
+  },
+  "who_to_follow": {
+    "more": "More",
+    "who_to_follow": "Who to follow"
+  }
+}