Add high-level Rondevu client with three connection methods

- Add Rondevu class with join(), connect(), and create() methods
- Add RondevuConnection wrapper for WebRTC connections
- Add event emitter for connection events
- Update to ES modules (ESNext) for Vite compatibility
- Simplify README to be more concise
- Update package.json to specify type: module

Three ways to connect:
- join(topic) for auto-discovery
- join(topic, {filter}) for peer ID filtering
- create(id)/connect(id) for direct connections

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

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

tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "ES2020",
-    "module": "commonjs",
+    "module": "ESNext",
     "lib": ["ES2020", "DOM"],
     "declaration": true,
     "outDir": "./dist",
@@ -10,7 +10,7 @@
     "esModuleInterop": true,
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "node",
+    "moduleResolution": "bundler",
     "resolveJsonModule": true
   },
   "include": ["src/**/*"],