feat: Implement Skills Manager View and Notifier Module

- Added `skills-manager.js` for managing Claude Code skills with functionalities for loading, displaying, and editing skills.
- Introduced a Notifier module in `notifier.ts` for CLI to server communication, enabling notifications for UI updates on data changes.
- Created comprehensive documentation for the Chain Search implementation, including usage examples and performance tips.
- Developed a test suite for the Chain Search engine, covering basic search, quick search, symbol search, and files-only search functionalities.

ccw/src/tools/cli-executor.ts

@@ -63,6 +63,7 @@ const ParamsSchema = z.object({
   id: z.string().optional(), // Custom execution ID (e.g., IMPL-001-step1)
   noNative: z.boolean().optional(), // Force prompt concatenation instead of native resume
   category: z.enum(['user', 'internal', 'insight']).default('user'), // Execution category for tracking
+  parentExecutionId: z.string().optional(), // Parent execution ID for fork/retry scenarios
 });
 
 // Execution category types