chore: add permissions to unit test gh worflow (#140)

* add permissions to unit test gh worflow

* remove experimental workflows

Author: friedrichwilken

.github/workflows/unit-test-reusable-with-read-permission.yml

@@ -8,6 +8,9 @@ on:
 jobs:
   unit:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      metadata: read
     steps:
       - name: Checkout code
         uses: actions/checkout@v4