Add Github CI workflow based on the .gitlab-ci.yml file

Author: davidruda

.github/actions/python-test-setup/action.yml

@@ -0,0 +1,22 @@
+name: Python test setup
+description: Shared Python and venv setup for CI test jobs
+runs:
+  using: composite
+  # This is a local composite action (stored in this repo), used by jobs in
+  # .github/workflows/ci.yml to avoid repeating the same setup commands.
+  steps:
+    - name: Set up Python
+      uses: actions/setup-python@v6
+      with:
+        python-version: "3.13"
+
+    # Shared commands that run before each job's test-specific commands.
+    - name: Setup venv and test dependencies
+      shell: bash
+      run: |
+        gcc --version
+        python3 -V
+        python3 -m venv .venv
+        source .venv/bin/activate
+        pip install --upgrade pip
+        pip install -r requirements-test.txt

.github/workflows/ci.yml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test_package_cmake:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v6
+      # Shared setup is implemented as a local composite action to avoid repeating the same commands in each job.
+      - uses: ./.github/actions/python-test-setup
+
+      - name: CMake package test
+        run: |
+          git --version
+          pip install cmake
+          cmake --version
+          make test_package_cmake
+
+  test_package_python:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v6
+      # Shared setup is implemented as a local composite action to avoid repeating the same commands in each job.
+      - uses: ./.github/actions/python-test-setup
+
+      - name: Python package test
+        run: |
+          .venv/bin/pip install ./traffic_signaling
+          make test_package_python
+
+  test_optimizer:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v6
+      # Shared setup is implemented as a local composite action to avoid repeating the same commands in each job.
+      - uses: ./.github/actions/python-test-setup
+
+      - name: Optimizer tests
+        run: |
+          .venv/bin/pip install -r requirements.txt
+          make test_optimizer
+
+  test_experiments:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v6
+      # Shared setup is implemented as a local composite action to avoid repeating the same commands in each job.
+      - uses: ./.github/actions/python-test-setup
+
+      - name: Experiments tests
+        run: |
+          .venv/bin/pip install -r requirements.txt
+          cd experiments
+          make test