Add comprehensive tests for tokenizer, performance benchmarks, and TreeSitter parser functionality

- Implemented unit tests for the Tokenizer class, covering various text inputs, edge cases, and fallback mechanisms.
- Created performance benchmarks comparing tiktoken and pure Python implementations for token counting.
- Developed extensive tests for TreeSitterSymbolParser across Python, JavaScript, and TypeScript, ensuring accurate symbol extraction and parsing.
- Added configuration documentation for MCP integration and custom prompts, enhancing usability and flexibility.
- Introduced a refactor script for GraphAnalyzer to streamline future improvements.

ccw/src/tools/cli-executor.ts

@@ -29,9 +29,6 @@ import {
   getPrimaryModel
 } from './cli-config-manager.js';
 
-// CLI History storage path
-const CLI_HISTORY_DIR = join(process.cwd(), '.workflow', '.cli-history');
-
 // Lazy-loaded SQLite store module
 let sqliteStoreModule: typeof import('./cli-history-store.js') | null = null;