[DX] Rework testing process, add test script to packages package.json

Author: Kocal

assets/package.json

@@ -9,7 +9,7 @@
     "scripts": {
         "build": "node ../../../bin/build_package.js .",
         "watch": "node ../../../bin/build_package.js . --watch",
-        "test": "echo 'The test script is not yet configured.' && exit 1",
+        "test": "../../../bin/test_package.sh .",
         "lint": "biome lint --write",
         "format": "biome format --write",
         "check-lint": "biome lint",