fix(mobile): hoist RN/Expo transitive deps for Metro resolution

pnpm's default strict isolation hides @babel/runtime/helpers/* and other
transitive deps from Metro, which expects flat node_modules layout.
Each missing dep was a separate failed EAS build (metro-runtime,
@babel/runtime, ...) — added .npmrc with public-hoist-pattern entries
that catch the common RN/Expo families so we stop whack-a-moling them.
Also kept @babel/runtime as direct dep of @chat-app/mobile for safety.

pnpm-lock.yaml

@@ -150,6 +150,9 @@ importers:
 
   apps/mobile:
     dependencies:
+      '@babel/runtime':
+        specifier: ^7.29.2
+        version: 7.29.2
       '@chat-app/db-types':
         specifier: workspace:*
         version: link:../../packages/db-types