migrating config to tmp folder

Closes #2585

See merge request !3379

Copy emoji in the subject from parent post

See merge request !3378

Sometimes people put emoji in the subject, which results in the subject
looking broken if someone replies to it from a server that does not
have the said emoji under the same shortcode. This patch solves the problem
by extending the emoji set available in the summary to that of the parent
post.

respect content-type header in finger request

Closes #2579

See merge request !3375

Workaround for RichMedia preview image breakage edge case

See merge request !3363

updating Timex

See merge request !3377

Simple way to decode mediaproxy URLs

See merge request !3364

Remove sensitive setting #nsfw

See merge request !3223

Add support for actor icon being a list (Bridgy)

See merge request !3372

Update OpenApiSpex dependency

See merge request !3362

Hashtags extraction from objects. Background migration infrastructure.

Closes #1840 and #2455

See merge request !3213

Translations update from Weblate

See merge request !3370

Currently translated at 100.0% (106 of 106 strings)

Translation: Pleroma/Pleroma backend
Translate-URL: https://translate.pleroma.social/projects/pleroma/pleroma/it/

Extracted BaseMigrator and BaseMigratorState.

Execute mix deps.get earlier and avoid duplicate invocations if possible

See merge request !3369

If we avoid URI.merge unless we know we need it we reduce the edge cases we could encounter.
The site would need to both have "//" in the %URI{:path} and the image needs to be a relative URL.

Ensure we fetch deps during spec-build stage

See merge request !3368

This reverts commit 502d166b.

Add OpenAPI spec for AdminAPI.UserController

See merge request !3355