Add gitea workflow to test and upload package

.gitea/workflows/upload-package.yaml

@@ -0,0 +1,29 @@
+name: Upload Package
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  test and upload package:
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-latest
+    env:
+      # workaround for container tool cache path, see https://gitea.com/gitea/act_runner/issues/70
+      RUNNER_TOOL_CACHE: /toolcache
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.11
+          cache: pip
+      - run: pip install -r requirements.txt -r test-requirements.txt build twine
+      # TODO: tests are currently broken
+      # - run: pytest --cov=openapi_client_udm
+
+      - run: python3 -m build
+      - run: python3 -m twine upload dist/*
+        env:
+          TWINE_REPOSITORY_URL: "${{ gitea.server_url }}/api/packages/${{ gitea.repository_owner }}/pypi"
+          TWINE_USERNAME: "${{ secrets.PACKAGE_REPO_USERNAME }}"
+          TWINE_PASSWORD: "${{ secrets.PACKAGE_REPO_PASSWORD }}"