Add URL preview above message composer (#33964)

* Modify LinkPreview to export shared atomics

* Implement MessageComposerUrlPreviewView

* Create UrlPreviewFetcher utility function

* Modify view models

* Implement in composer

* Support running tests in dom-less vitest environment

* Add a playwright test

* hide another one

* fmt

* cleanup

* test rte too

* fixup

* Add back docstring

* cleanup

* off by one

* remove description check

* Cleanup hacks

* Remove another hack

* cleanup

* one more

* fixup window here too

* whoops type

* Rename to be cleaeer

* Trim URLs first

* fix bug

apps/web/tsconfig.json

@@ -14,7 +14,7 @@
         "outDir": "./lib",
         "declaration": true,
         "jsx": "react",
-        "lib": ["es2022", "es2024.promise", "dom", "dom.iterable"],
+        "lib": ["es2022", "es2024.promise", "dom", "dom.iterable", "ESNext.Collection"],
         "strict": true,
         "types": ["node", "modernizr"],
         "paths": {