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/view/shell/NavSignupCard.tsx

@@ -36,7 +36,7 @@ let NavSignupCard = ({}: {}): React.ReactNode => {
 
       <View style={[a.pt_lg]}>
         <Text
-          style={[a.text_3xl, a.font_heavy, {lineHeight: a.text_3xl.fontSize}]}>
+          style={[a.text_3xl, a.font_bold, {lineHeight: a.text_3xl.fontSize}]}>
           <Trans>Join the conversation</Trans>
         </Text>
       </View>