feat: initial Flask project setup with factory pattern

tests/conftest.py

@@ -0,0 +1,60 @@
+import pytest
+from app import create_app, db as _db
+
+
+@pytest.fixture
+def app(tmp_path):
+    config_path = tmp_path / "config.toml"
+    config_path.write_text("""
+[vehicles.voiture]
+name = "Peugeot 308"
+fuel = "diesel"
+co2_per_km = 142
+cv = 5
+
+[vehicles.velo]
+name = "Vélo"
+fuel = "none"
+co2_per_km = 0
+
+[journeys.voiture_seule]
+name = "Voiture seule"
+distances = { voiture = 25 }
+
+[journeys.voiture_velo]
+name = "Voiture + Vélo"
+distances = { voiture = 14, velo = 8 }
+
+[journeys.velo_seul]
+name = "Vélo seul"
+distances = { velo = 24 }
+
+[[bareme_kilometrique.2025.cv_5.tranches]]
+km_max = 3000
+taux = 0.548
+forfait = 0
+
+[[bareme_kilometrique.2025.cv_5.tranches]]
+km_max = 6000
+taux = 0.316
+forfait = 699
+
+[[bareme_kilometrique.2025.cv_5.tranches]]
+km_max = 0
+taux = 0.364
+forfait = 0
+""", encoding="utf-8")
+
+    application = create_app(config_path=str(config_path))
+    application.config["TESTING"] = True
+    application.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///:memory:"
+
+    with application.app_context():
+        _db.create_all()
+        yield application
+        _db.drop_all()
+
+
+@pytest.fixture
+def client(app):
+    return app.test_client()