feat: implement Claudeman - Claude session manager with Ralph Loop

Claudeman manages multiple Claude CLI sessions as subprocesses with:
- Session management (start/stop/list/logs)
- Priority-based task queue with dependency support
- Ralph Loop for autonomous task assignment and completion detection
- Time-aware loops for extended work sessions
- JSON file persistence to ~/.claudeman/state.json

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

src/index.ts

@@ -0,0 +1,17 @@
+#!/usr/bin/env node
+
+import { program } from './cli.js';
+
+// Handle uncaught errors
+process.on('uncaughtException', (err) => {
+  console.error('Uncaught exception:', err.message);
+  process.exit(1);
+});
+
+process.on('unhandledRejection', (reason) => {
+  console.error('Unhandled rejection:', reason);
+  process.exit(1);
+});
+
+// Run CLI
+program.parse();