Add WebRTC connection manager and fix race condition

- Add RondevuConnection class for high-level WebRTC management
- Handles offer/answer exchange, ICE candidates, and data channels
- Fix race condition in answer() method (register answerer before sending ICE)
- Add event-driven API (connecting, connected, disconnected, error, datachannel, track)
- Update README with connection manager examples
- Export new connection types and classes

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

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

src/bloom.ts

@@ -0,0 +1,83 @@
+// Declare Buffer for Node.js compatibility
+declare const Buffer: any;
+
+/**
+ * Simple bloom filter implementation for peer ID exclusion
+ * Uses multiple hash functions for better distribution
+ */
+export class BloomFilter {
+  private bits: Uint8Array;
+  private size: number;
+  private numHashes: number;
+
+  constructor(size: number = 1024, numHashes: number = 3) {
+    this.size = size;
+    this.numHashes = numHashes;
+    this.bits = new Uint8Array(Math.ceil(size / 8));
+  }
+
+  /**
+   * Add a peer ID to the filter
+   */
+  add(peerId: string): void {
+    for (let i = 0; i < this.numHashes; i++) {
+      const hash = this.hash(peerId, i);
+      const index = hash % this.size;
+      const byteIndex = Math.floor(index / 8);
+      const bitIndex = index % 8;
+      this.bits[byteIndex] |= 1 << bitIndex;
+    }
+  }
+
+  /**
+   * Test if peer ID might be in the filter
+   */
+  test(peerId: string): boolean {
+    for (let i = 0; i < this.numHashes; i++) {
+      const hash = this.hash(peerId, i);
+      const index = hash % this.size;
+      const byteIndex = Math.floor(index / 8);
+      const bitIndex = index % 8;
+      if (!(this.bits[byteIndex] & (1 << bitIndex))) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  /**
+   * Get raw bits for transmission
+   */
+  toBytes(): Uint8Array {
+    return this.bits;
+  }
+
+  /**
+   * Convert to base64 for URL parameters
+   */
+  toBase64(): string {
+    // Convert Uint8Array to regular array then to string
+    const binaryString = String.fromCharCode(...Array.from(this.bits));
+    // Use btoa for browser, or Buffer for Node.js
+    if (typeof btoa !== 'undefined') {
+      return btoa(binaryString);
+    } else if (typeof Buffer !== 'undefined') {
+      return Buffer.from(this.bits).toString('base64');
+    } else {
+      // Fallback: manual base64 encoding
+      throw new Error('No base64 encoding available');
+    }
+  }
+
+  /**
+   * Simple hash function (FNV-1a variant)
+   */
+  private hash(str: string, seed: number): number {
+    let hash = 2166136261 ^ seed;
+    for (let i = 0; i < str.length; i++) {
+      hash ^= str.charCodeAt(i);
+      hash += (hash << 1) + (hash << 4) + (hash << 7) + (hash << 8) + (hash << 24);
+    }
+    return hash >>> 0;
+  }
+}