feat: support shared theme-aware tw styles

[e-simpson]

Summary

• Preserves dark: and light: variants generated by module-level tw and twStyle calls.
• Adds useTwStyle() to resolve shared styles reactively inside a component.
• Makes useTwStyle() honor the Babel plugin's configured colorScheme.importFrom and colorScheme.importName hook.
• Keeps pure resolveTwStyle() for explicit or controlled scheme values.

Why

Hooks cannot run at module scope, but shared styles still need to retain every theme variant. A runtime helper also cannot read consumer Babel options by itself, so hardcoding React Native's system useColorScheme would bypass applications with a custom theme provider.

The compiler now injects the configured hook at the legal component boundary and passes its value to useTwStyle:

const cardStyles = tw`bg-white dark:bg-gray-900`;

function Card() {
  const style = useTwStyle(cardStyles);
  return <View style={style} />;
}

With:

colorScheme: {
  importFrom: "@/theme/useColorScheme",
  importName: "useAppColorScheme",
}

the generated component uses useAppColorScheme(), not React Native's system hook. The plugin also rejects module-scope useTwStyle calls and supports aliased imports.

Validation

• bun run spec — 1,066 passed, 1 skipped
• bun run check
• bun run lint
• bun run format:check
• bun run build
• git diff --check