[🐴] Rich text in messages (#3926)

* add facets to message

* richtext messages

* undo richtexttag changes

* whoops, don't redetect facets

* dont set color directly

* shorten links and filter invalid facets

* fix link shortening

* pass in underline style

src/lib/strings/rich-text-manip.ts

@@ -1,4 +1,5 @@
 import {RichText, UnicodeString} from '@atproto/api'
+
 import {toShortUrl} from './url-helpers'
 
 export function shortenLinks(rt: RichText): RichText {