fix(logger): Replace direct console logging with unified logger interface for consistent formatting

ts/cli.ts

@@ -3,6 +3,7 @@ import { promises as fs } from 'fs';
 import { dirname, join } from 'path';
 import { fileURLToPath } from 'url';
 import { Nupst } from './nupst.js';
+import { logger } from './logger.js';
 
 /**
  * Class for handling CLI commands