Initial test GH action.

.github/workflows/test.yml

@@ -0,0 +1,36 @@
+name: Test Qadence.
+
+on:
+  pull_request:
+    branches:
+      - main
+      - develop
+  push:
+    branches:
+      - develop
+  schedule:
+    # 03:00 every Saturday morning
+    - cron: '0 3 * * 6'
+  workflow_dispatch: {}
+
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  build_test_pytket_ubuntu:
+    name: Build and test pytket (ubuntu)
+    needs: check_changes
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v4
+    - name: Select Python 3.10
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'
+    - name: Install Hatch
+      run: |
+        pip install hatch
+    - name: Run tests
+      run: |
+        hatch -v run tests