chore: use more conventional XDG_CONFIG_HOME for config

src/cli/onboard.ts

@@ -11,7 +11,7 @@ export function onboardCommand(program: Command): void {
     .description('Initialize a new nanobot workspace with config and templates')
     .action(async (rawPath?: string) => {
       try {
-        const targetPath = resolvePath(rawPath ?? '~/.nanobot');
+        const targetPath = resolvePath(rawPath ?? '~/.config/nanobot');
         const configPath = join(targetPath, 'config.json');
 
         console.info(pc.blue('Initializing nanobot workspace...'));