Add tags and mute words (#2968)

* Add bare minimum hashtags support (#2804)

* Add bare minimum hashtags support

As atproto/api already parses hashtags, this is as simple as hooking it
up like link segments.

This is "bare minimum" because:

- Opening hashtag "#foo" is actually just a search for "foo" right now
  to work around #2491.
- There is no integration in the composer. This hasn't stopped people
  from using hashtags already, and can be added later.
- This change itself only had to hook things up - thank you for having
  already put the hashtag parsing in place.

* Remove workaround for hash search not working now that it's fixed

* Add RichTextTag and TagMenu

* Sketch

* Remove hackfix

* Some cleanup

* Sketch web

* Mobile design

* Mobile handling of tags search

* Web only

* Fix navigation woes

* Use new callback

* Hook it up

* Integrate muted tags

* Fix dropdown styles

* Type error

* Use close callback

* Fix styles

* Cleanup, install latest sdk

* Quick muted words screen

* Targets

* Dir structure

* Icons, list view

* Move to dialog

* Add removal confirmation

* Swap copy

* Improve checkboxees

* Update matching, add tests

* Moderate embeds

* Create global dialogs concept again to prevent flashing

* Add access from moderation screen

* Highlight tags on native

* Add web highlighting

* Add close to web modal

* Adjust close color

* Rename toggles and adjust logic

* Icon update

* Load states

* Improve regex

* Improve regex

* Improve regex

* Revert link test

* Hyphenated words

* Improve matching

* Enhance

* Some tweaks

* Muted words modal changes

* Handle invalid handles, handle long tags

* Remove main regex

* Better test

* Space/punct check drop to includes

* Lowercase post text before comparison

* Add better real world test case

---------

Co-authored-by: Kisaragi Hiu <mail@kisaragi-hiu.com>

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