Install prettier-plugin-svelte at workspace root to fix changeset github action

Author: techniq

package.json

@@ -19,6 +19,7 @@
   "devDependencies": {
     "@changesets/cli": "^2.27.8",
     "@svitejs/changesets-changelog-github-compact": "^1.2.0",
+    "prettier-plugin-svelte": "^3.3.3",
     "rimraf": "6.0.1",
     "wrangler": "^3.110.0"
   },