feat: Add CCW MCP server and tools integration

- Introduced `ccw-mcp` command for running CCW tools as an MCP server.
- Updated `package.json` to include new MCP dependencies and scripts.
- Enhanced CLI with new options for `codex_lens` tool.
- Implemented MCP server logic to expose CCW tools via Model Context Protocol.
- Added new tools and updated existing ones for better functionality and documentation.
- Created quick start and full documentation for MCP server usage.
- Added tests for MCP server functionality to ensure reliability.

ccw/src/tools/smart-search.js

@@ -577,19 +577,14 @@ async function execute(params) {
  */
 export const smartSearchTool = {
   name: 'smart_search',
-  description: `Unified search with intelligent mode selection.
+  description: `Intelligent code search with multiple modes.
 
-Modes:
-- auto: Classify intent and recommend optimal search mode (default)
-- exact: Precise literal matching via ripgrep
-- fuzzy: Approximate matching with typo tolerance
-- semantic: Natural language understanding via LLM/embeddings
-- graph: Dependency relationship traversal
+Usage:
+  smart_search(query="function main", path=".")           # Auto-select mode
+  smart_search(query="def init", mode="exact")            # Exact match
+  smart_search(query="authentication logic", mode="semantic")  # NL search
 
-Features:
-- Multi-backend search coordination
-- Result fusion with RRF ranking
-- Configurable result limits and context`,
+Modes: auto (default), exact, fuzzy, semantic, graph`,
   parameters: {
     type: 'object',
     properties: {