feat: add minimal companion client CLI command

src/cli/index.ts

@@ -29,6 +29,7 @@ import { registerZaiAuthCommand } from './zai-auth.js';
 import { registerAnthropicAuthCommand } from './anthropic-auth.js';
 import { registerSkillsCommand } from './skills.js';
 import { registerBackupCommand } from './backup.js';
+import { registerCompanionCommand } from './companion.js';
 
 export function createProgram(): Command {
   const program = new Command();
@@ -58,6 +59,7 @@ export function createProgram(): Command {
   registerAnthropicAuthCommand(program);
   registerSkillsCommand(program);
   registerBackupCommand(program);
+  registerCompanionCommand(program);
 
   return program;
 }