Application Layout Framework (#1732)

* Initial library setup

* Add docblocks

* Some cleanup

* New storybook

* Playing around

* Remove silly test, use for...in

* Memo

* Memo

* Add hooks example

* Tweak colors, bit of cleanup

* Improve macro handling

* Add some more examples

* Rename for better diff

* Cleanup

* Add nested context example

* Add todo

* Less break more perf

* Buttons, you get the idea

* Fix test

* Remove temp colors

* Add a few more common macros

* Docs

* Perf improvements

* Alf go brrrr

* Update breakpoint handling

* I think it'll work

* Better naming, better code

* Fix typo

* Some renaming

* More complete pass at Tailwind naming

* Build out storybook

* Playing around with curves

* Revert "Playing around with curves"

This reverts commit 6b0e0e5c9d842a2d9af31b53affe2f6291c3fa0d.

* Smooth brain

* Remove outdated docs

* Some docs, fix line-height values, export tokens

src/alf/util/platform.ts

@@ -0,0 +1,25 @@
+import {Platform} from 'react-native'
+
+export function web(value: any) {
+  return Platform.select({
+    web: value,
+  })
+}
+
+export function ios(value: any) {
+  return Platform.select({
+    ios: value,
+  })
+}
+
+export function android(value: any) {
+  return Platform.select({
+    android: value,
+  })
+}
+
+export function native(value: any) {
+  return Platform.select({
+    native: value,
+  })
+}

src/alf/util/useColorModeTheme.ts

@@ -0,0 +1,10 @@
+import {useColorScheme} from 'react-native'
+
+import * as persisted from '#/state/persisted'
+
+export function useColorModeTheme(
+  theme: persisted.Schema['colorMode'],
+): 'light' | 'dark' {
+  const colorScheme = useColorScheme()
+  return (theme === 'system' ? colorScheme : theme) || 'light'
+}