docs: add JSDoc headers to entry points and key modules

Add @fileoverview documentation to:
- src/index.ts - CLI entry point
- src/cli.ts - Command definitions
- src/templates/claude-md.ts - Template generation with function docs
- src/web/server.ts - Web server and API

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/cli.ts

@@ -1,3 +1,12 @@
+/**
+ * @fileoverview Claudeman CLI command definitions
+ *
+ * Defines all CLI commands and subcommands for managing Claude sessions,
+ * tasks, Ralph loops, and the web server.
+ *
+ * @module cli
+ */
+
 import { Command } from 'commander';
 import chalk from 'chalk';
 import { getSessionManager } from './session-manager.js';