feat(cli): port complete entry point from JavaScript to TypeScript

- Port bin/ccs.js (1033 LOC) to src/ccs.ts (~1000 LOC)
- Implement all command handlers: version, help, doctor, sync, update, auth
- Add profile routing: settings-based (glm, glmt, kimi) and account-based
- Add GLMT proxy lifecycle: spawn, ready signal, cleanup on exit
- Add delegation routing (-p flag) to DelegationHandler
- Add shell completion installer
- Add public isHealthy() method to Doctor class
- All 39 tests passing

src/management/doctor.ts

@@ -758,6 +758,13 @@ class Doctor {
       healthy: this.results.isHealthy()
     }, null, 2);
   }
+
+  /**
+   * Check if the health check results are healthy
+   */
+  isHealthy(): boolean {
+    return this.results.isHealthy();
+  }
 }
 
 export default Doctor;