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/SavedFeeds.tsx

@@ -374,7 +374,7 @@ function SectionHeaderText({children}: {children: React.ReactNode}) {
         a.border_b,
         t.atoms.border_contrast_low,
       ]}>
-      <Text style={[a.text_xl, a.font_heavy, a.leading_snug]}>{children}</Text>
+      <Text style={[a.text_xl, a.font_bold, a.leading_snug]}>{children}</Text>
     </View>
   )
 }
@@ -406,7 +406,7 @@ function FollowingFeedCard() {
         />
       </View>
       <View style={[a.flex_1, a.flex_row, a.gap_sm, a.align_center]}>
-        <Text style={[a.text_sm, a.font_bold, a.leading_snug]}>
+        <Text style={[a.text_sm, a.font_semi_bold, a.leading_snug]}>
           <Trans context="feed-name">Following</Trans>
         </Text>
       </View>