Add GitHub CI build

.github/workflows/build-blender-addon.yaml

@@ -0,0 +1,32 @@
+name: Build Blender addon
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies 
+        run: |
+          pip install pygit2
+          ls -la
+          pwd
+          python --version
+          echo "REF=${{ github.event.pull_request && github.head_ref || github.ref_name }}" >> $GITHUB_ENV
+      - name: Build addon
+        run: |
+          python scripts/build_release.py github
+          ls -la
+      - uses: actions/upload-artifact@v3
+        with:
+          name: blenderDMX_${{ env.REF }}.zip
+          path: build/
+