Add CI workflow to run Pester tests before deployment

.gitea/workflows/Publish Module.yaml

@@ -8,7 +8,26 @@ on:
   workflow_dispatch:
 
 jobs:
+  test:
+    runs-on: ubuntu-22.04
+    container:
+      image: catthehacker/ubuntu:pwsh-latest
+  
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+
+      - name: Run pester tests and verify all tests pass
+        shell: pwsh
+        run: |
+
+          Write-Host "Changing to repository directory: ${{ github.workspace }}"
+          Set-Location -Path ${{ github.workspace }}
+          Write-Host "Running Pester tests"
+          Invoke-Pester -Path . -PassThru | Select-Object -ExpandProperty FailedCount | Should -Be 0 -ErrorAction stop
+  
   deploy:
+    needs: test
     runs-on: ubuntu-22.04
     container:
       image: catthehacker/ubuntu:pwsh-latest