.github: add Tests workflow

.github/workflows/tests.yml

@@ -0,0 +1,34 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-24.04
+    
+    env:
+      PYTHONPATH: ${{ github.workspace }}:${{ github.workspace }}/web
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+        
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pytest
+        pip install -r tests/requirements.txt
+        pip install -r web/requirements.txt
+        
+    - name: Run tests
+      run: |
+        pytest tests/ -v --tb=short