Adds environment variable preparation step to build and deploy workflow

.gitea/workflows/build-and-deploy.yml

@@ -13,6 +13,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: ⚙️ Prepare Environment Variables
+        run: |
+          echo "AGENT_TOOLSDIRECTORY=/home/runner/toolcache" >> $GITHUB_ENV
+          mkdir -p /home/runner/toolcache
+
       - name: Checkout Repository
         uses: actions/checkout@v4