v0.13.0: Major refactoring with unified Rondevu class and service discovery

- Renamed RondevuService to Rondevu as single main entrypoint
- Integrated signaling methods directly into Rondevu class
- Updated service FQN format: service:version@username (colon instead of @)
- Added service discovery (direct, random, paginated)
- Removed high-level abstractions (ServiceHost, ServiceClient, RTCDurableConnection, EventBus, WebRTCContext, Bin)
- Updated RondevuAPI with new endpoint methods (offer-specific routes)
- Simplified types (moved Binnable to types.ts, removed connection types)
- Updated RondevuSignaler to use Rondevu class
- Breaking changes: Complete API overhaul for simplicity

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/types.ts

@@ -1,39 +1,15 @@
 /**
- * Core connection types
+ * Core signaling types
  */
-import { EventBus } from './event-bus.js'
-import { Binnable } from './bin.js'
 
-export type Message = string | ArrayBuffer
-
-export interface QueueMessageOptions {
-    expiresAt?: number
-}
-
-export interface ConnectionEvents {
-    'state-change': ConnectionInterface['state']
-    message: Message
-}
-
-export const ConnectionStates = [
-    'connected',
-    'disconnected',
-    'connecting'
-] as const
-
-export const isConnectionState = (state: string): state is (typeof ConnectionStates)[number] =>
-    ConnectionStates.includes(state as any)
-
-export interface ConnectionInterface {
-    state: (typeof ConnectionStates)[number]
-    lastActive: number
-    expiresAt?: number
-    events: EventBus<ConnectionEvents>
-
-    queueMessage(message: Message, options?: QueueMessageOptions): Promise<void>
-    sendMessage(message: Message): Promise<boolean>
-}
+/**
+ * Cleanup function returned by listener methods
+ */
+export type Binnable = () => void
 
+/**
+ * Signaler interface for WebRTC offer/answer/ICE exchange
+ */
 export interface Signaler {
     addIceCandidate(candidate: RTCIceCandidate): Promise<void>
     addListener(callback: (candidate: RTCIceCandidate) => void): Binnable