Fix ES module imports by adding .js extensions

- Added .js extensions to all import statements in source files
- Fixes ERR_MODULE_NOT_FOUND error when using package with Node.js
- Version bumped to 0.2.2

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/index.ts

@@ -4,13 +4,13 @@
  */
 
 // Export main WebRTC client class
-export { Rondevu } from './rondevu';
+export { Rondevu } from './rondevu.js';
 
 // Export connection class
-export { RondevuConnection } from './connection';
+export { RondevuConnection } from './connection.js';
 
 // Export low-level signaling API (for advanced usage)
-export { RondevuAPI } from './client';
+export { RondevuAPI } from './client.js';
 
 // Export all types
 export type {
@@ -39,4 +39,4 @@ export type {
   HealthResponse,
   ErrorResponse,
   RondevuClientOptions,
-} from './types';
+} from './types.js';