Migrate to @bsky.app/alf package (#9030)

* Add storybook shortcut in dev

* Migrate to alg pkg

* Migrate font_bold to new font_semi_bold

* Migrate font_heavy to font_bold

* Fix old theme refs

* Remove leading util

* Bump

* Revert "Add storybook shortcut in dev"

This reverts commit 7a86195c77fb5d449c7782e64ebabb6addfab919.

* Remove alf script

* Adjust font scale

* Bump

* Bump pkg

* Migrate values from conflicts

* Create default themes outside react

* Use built-in alf utils

* Migrate old font styles

* Remove unused tokens

* Move theme creation to more appropriate file

* Update button colors

* Adjust TextField colors, line heights

src/screens/VideoFeed/components/Header.tsx

@@ -120,7 +120,7 @@ export function FeedHeader({
         <Text
           style={[
             a.text_md,
-            a.font_heavy,
+            a.font_bold,
             a.leading_tight,
             gtMobile && a.text_lg,
           ]}

src/screens/VideoFeed/components/Scrubber.tsx

@@ -179,7 +179,7 @@ export function Scrubber({
           timeStyle,
         ]}
         pointerEvents="none">
-        <Text style={[a.text_center, a.font_bold]}>
+        <Text style={[a.text_center, a.font_semi_bold]}>
           <Text style={[a.text_5xl, {fontVariant: ['tabular-nums']}]}>
             {formatTime(currentSeekTime)}
           </Text>