Replace origin override with global option

- Remove origin parameter from connect() method
- Add ConnectOptions interface with global flag
- When global: true, sends X-Rondevu-Global header instead of trying to override Origin
- Update client methods to accept customHeaders parameter
- Pass custom headers through connection polling and ICE candidate exchange
- Bump version to 0.1.0

This change works around browser restriction on Origin header modification.

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

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

src/connection.ts

@@ -21,8 +21,9 @@ export class RondevuConnection extends EventEmitter {
   private connectionTimer?: ReturnType<typeof setTimeout>;
   private isPolling: boolean = false;
   private isClosed: boolean = false;
+  private customHeaders?: Record<string, string>;
 
-  constructor(params: RondevuConnectionParams, client: RondevuClient) {
+  constructor(params: RondevuConnectionParams, client: RondevuClient, customHeaders?: Record<string, string>) {
     super();
     this.id = params.id;
     this.topic = params.topic;
@@ -34,6 +35,7 @@ export class RondevuConnection extends EventEmitter {
     this.dataChannels = new Map();
     this.pollingIntervalMs = params.pollingInterval;
     this.connectionTimeoutMs = params.connectionTimeout;
+    this.customHeaders = customHeaders;
 
     this.setupEventHandlers();
     this.startConnectionTimeout();
@@ -119,7 +121,7 @@ export class RondevuConnection extends EventEmitter {
         code: this.id,
         candidate: JSON.stringify(candidate.toJSON()),
         side: this.role,
-      });
+      }, this.customHeaders);
     } catch (err: any) {
       throw new Error(`Failed to send ICE candidate: ${err.message}`);
     }
@@ -169,7 +171,7 @@ export class RondevuConnection extends EventEmitter {
     }
 
     try {
-      const response = await this.client.poll(this.id, this.role);
+      const response = await this.client.poll(this.id, this.role, this.customHeaders);
 
       if (this.role === 'offerer') {
         const offererResponse = response as { answer: string | null; answerCandidates: string[] };