feat: enable Claude in Chrome MCP with full browser control

Replace the 6-line stub in @ant/claude-for-chrome-mcp with the complete
implementation (8 files, 3038 lines) from the reference project.

Provides 17 browser tools: navigate, screenshot, click, type, read DOM,
execute JS, record GIF, monitor console/network, manage tabs, etc.

No feature flag needed. No changes to src/ (already matches official).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/@ant/claude-for-chrome-mcp/src/index.ts

@@ -1,11 +1,15 @@
-export const BROWSER_TOOLS: any[] = []
-
-export class ClaudeForChromeContext {}
-
-export class Logger {}
-
-export type PermissionMode = any
-
-export function createClaudeForChromeMcpServer(..._args: any[]): any {
-  return null
-}
+export { BridgeClient, createBridgeClient } from "./bridgeClient.js";
+export { BROWSER_TOOLS } from "./browserTools.js";
+export {
+  createChromeSocketClient,
+  createClaudeForChromeMcpServer,
+} from "./mcpServer.js";
+export { localPlatformLabel } from "./types.js";
+export type {
+  BridgeConfig,
+  ChromeExtensionInfo,
+  ClaudeForChromeContext,
+  Logger,
+  PermissionMode,
+  SocketClient,
+} from "./types.js";