feat: add integration workflow for testing multiple packages (#5412)

Author: ekzhu

.github/workflows/integration.yml

@@ -0,0 +1,55 @@
+name: Integration
+
+on:
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: 'Branch to run tests'
+        required: true
+        type: string
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    environment: integration
+    strategy:
+      matrix:
+        package:
+          [
+            "./packages/autogen-core",
+            "./packages/autogen-ext",
+            "./packages/autogen-agentchat",
+          ]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.branch }}
+      - uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
+          version: "0.5.18"
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Run uv sync
+        run: |
+          uv sync --locked --all-extras
+          echo "PKG_NAME=$(basename '${{ matrix.package }}')" >> $GITHUB_ENV
+
+        working-directory: ./python
+      - name: Run task
+        run: |
+          source ${{ github.workspace }}/python/.venv/bin/activate
+          poe --directory ${{ matrix.package }} test
+        working-directory: ./python
+
+      - name: Move coverage file
+        run: |
+          mv ${{ matrix.package }}/coverage.xml coverage_${{ env.PKG_NAME }}.xml
+        working-directory: ./python
+
+      - name: Upload coverage artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-${{ env.PKG_NAME }}
+          path: ./python/coverage_${{ env.PKG_NAME }}.xml