ci: install project in CI to satisfy runtime deps before tests

Author: CoderDeltaLAN

.github/workflows/ci.yml

@@ -26,6 +26,9 @@ jobs:
         run: python -m pip install -U pip
 
       - name: Install tools
+
+      - name: Install project
+        run: pip install -e .
         run: pip install pytest mypy ruff black
 
       - name: Ruff