feat(cli): add CLI entry point with commander and start command

src/cli/index.test.ts

@@ -0,0 +1,26 @@
+import { describe, it, expect } from 'vitest';
+import { createProgram } from './index.js';
+
+describe('CLI program', () => {
+  it('creates a commander program with expected commands', () => {
+    const program = createProgram();
+    const commandNames = program.commands.map((c) => c.name());
+
+    expect(commandNames).toContain('start');
+    expect(commandNames).toContain('tui');
+    expect(commandNames).toContain('send');
+    expect(commandNames).toContain('sessions');
+    expect(commandNames).toContain('doctor');
+    expect(commandNames).toContain('config');
+  });
+
+  it('has version info', () => {
+    const program = createProgram();
+    expect(program.version()).toBeDefined();
+  });
+
+  it('has description', () => {
+    const program = createProgram();
+    expect(program.description()).toContain('AI');
+  });
+});