Add packageManager field for pnpm version in CI

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: puikinsh

package.json

@@ -3,6 +3,7 @@
 	"private": true,
 	"version": "0.0.1",
 	"type": "module",
+	"packageManager": "pnpm@10.28.1",
 	"scripts": {
 		"dev": "vite dev",
 		"build": "vite build",