chore: remove redundant npm-run-all2 (#7)

Remove `npm-run-all2` in order to minimize unecessary dependencies.
`pnpm` already offers utilities for running multiple scripts:
https://pnpm.io/cli/run#running-multiple-scripts
Therefore we have no need for `npm-run-all2` and can remove it and its
sub-dependencies.

package.json

@@ -28,7 +28,6 @@
     "eslint-plugin-vue": "^9.19.2",
     "jsdom": "^23.0.1",
     "lint-staged": "^15.2.0",
-    "npm-run-all2": "^6.1.1",
     "prettier": "^3.1.1",
     "publint": "^0.2.6",
     "sass": "^1.69.5",

packages/sit-onyx/package.json

@@ -25,7 +25,7 @@
   },
   "scripts": {
     "dev": "storybook dev -p 6006 --no-open",
-    "build": "run-p type-check build-only",
+    "build": "pnpm run '/type-check|build-only/'",
     "build:storybook": "storybook build",
     "preview": "vite serve storybook-static",
     "test:unit": "vitest",