EmojiReactions: Rename to EmojiReacts

docs/API/differences_in_mastoapi_responses.md

lib/pleroma/activity.ex

lib/pleroma/notification.ex

lib/pleroma/web/activity_pub/transmogrifier.ex

lib/pleroma/web/activity_pub/utils.ex

priv/static/schemas/litepub-0.1.jsonld

test/fixtures/emoji-reaction-no-emoji.json

test/fixtures/emoji-reaction-too-long.json

test/fixtures/emoji-reaction.json

test/web/activity_pub/activity_pub_test.exs

test/web/activity_pub/transmogrifier_test.exs

test/web/mastodon_api/views/notification_view_test.exs