chore: added schema generation script

Author: Brummos

packages/credential-design-manager/package.json

@@ -23,7 +23,8 @@
     }
   },
   "scripts": {
-    "build": "tsup --config ../../tsup.config.ts --tsconfig ../../tsconfig.tsup.json"
+    "build": "tsup --config ../../tsup.config.ts --tsconfig ../../tsconfig.tsup.json",
+    "generate-plugin-schema": "tsx ../../packages/dev/bin/sphereon.js dev generate-plugin-schema"
   },
   "dependencies": {
     "@sphereon/ssi-sdk.data-store-types": "workspace:*",