Scaffold the project: pyproject, gitignore, constants, Doxyfile, README, CI

Task: MIL-002#1
Task: MIL-002#2
Task: MIL-002#3
Task: MIL-002#4
Task: MIL-002#5

.gitea/workflows/ci.yml

@@ -0,0 +1,26 @@
+# Run the tests on every push and pull request.
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      - name: Install a virtual display and Tk
+        run: sudo apt-get update && sudo apt-get install -y xvfb python3-tk
+      - name: Install the development dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --group dev
+      - name: Run the tests
+        run: xvfb-run python -m pytest