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/components/PolicyUpdateOverlay/Badge.tsx

@@ -25,7 +25,7 @@ export function Badge() {
         <Logo fill={t.palette.primary_600} width={14} />
         <Text
           style={[
-            a.font_bold,
+            a.font_semi_bold,
             {
               color: t.palette.primary_600,
             },

src/components/PolicyUpdateOverlay/updates/202508/index.tsx

@@ -69,7 +69,7 @@ export function Content({state}: {state: PolicyUpdateState}) {
 
         {screenReaderEnabled ? (
           <View style={[a.gap_sm]}>
-            <Text emoji style={[a.text_2xl, a.font_bold, a.leading_snug]}>
+            <Text emoji style={[a.text_2xl, a.font_semi_bold, a.leading_snug]}>
               <Trans>Hey there 👋</Trans>
             </Text>
             <Text style={[a.leading_snug, a.text_md]}>
@@ -115,7 +115,7 @@ export function Content({state}: {state: PolicyUpdateState}) {
           </View>
         ) : (
           <View style={[a.gap_sm]}>
-            <Text emoji style={[a.text_2xl, a.font_bold, a.leading_snug]}>
+            <Text emoji style={[a.text_2xl, a.font_semi_bold, a.leading_snug]}>
               <Trans>Hey there 👋</Trans>
             </Text>
             <Text style={[a.leading_snug, a.text_md]}>