Add moduleSuffixes to tsconfig

Resolve platform-specific modules native-first ([".ios", ".android",
".native", ""]) during typechecking, matching the react-native
customConditions already set by the base config. Typecheck now sees the
.native variants of web-only modules, so their throw-stubs gain real
signatures (typed props, never return, error class exports) to keep
their web consumers typechecking correctly.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCuMKXWHuyGoNhTVAHBMyk

src/view/com/composer/videos/SubtitleFilePicker.native.tsx

@@ -1,3 +1,6 @@
-export function SubtitleFilePicker() {
+export function SubtitleFilePicker(_props: {
+  onSelectFile: (file: File) => void
+  disabled?: boolean
+}): never {
   throw new Error('SubtitleFilePicker is a web-only component')
 }