Enhance CI with GitHub Actions for testing and detailed output

.github/workflows/tests.yml

@@ -0,0 +1,38 @@
+name: Tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e . pytest
+
+      - name: Install vcsim and govc
+        run: |
+          mkdir -p "$RUNNER_TEMP/govmomi-bin"
+          curl -fsSL -o "$RUNNER_TEMP/vcsim.tar.gz" https://github.com/vmware/govmomi/releases/download/v0.53.1/vcsim_Linux_x86_64.tar.gz
+          tar -xzf "$RUNNER_TEMP/vcsim.tar.gz" -C "$RUNNER_TEMP/govmomi-bin"
+          curl -fsSL -o "$RUNNER_TEMP/govc.tar.gz" https://github.com/vmware/govmomi/releases/download/v0.53.1/govc_Linux_x86_64.tar.gz
+          tar -xzf "$RUNNER_TEMP/govc.tar.gz" -C "$RUNNER_TEMP/govmomi-bin"
+          chmod +x "$RUNNER_TEMP/govmomi-bin/vcsim" "$RUNNER_TEMP/govmomi-bin/govc"
+          printf '%s\n' "$RUNNER_TEMP/govmomi-bin" >> "$GITHUB_PATH"
+
+      - name: Run test suite
+        run: |
+          pytest
+          pytest --run-integration tests/integration_vcsim