feat: Initialize frontend and backend structure with essential configurations

- Added TypeScript build info for frontend.
- Created Vite configuration for React application.
- Implemented pre-commit hook to run checks before commits.
- Set up PostgreSQL Dockerfile with PostGIS support and initialization scripts.
- Added database creation script for PostgreSQL with necessary extensions.
- Established Python project configuration with dependencies and development tools.
- Developed pre-commit script to enforce code quality checks for backend and frontend.
- Created PowerShell script to set up Git hooks path.

backend/tests/test_network_api.py

@@ -0,0 +1,35 @@
+from fastapi.testclient import TestClient
+
+from backend.app.main import app
+
+AUTH_CREDENTIALS = {"username": "demo", "password": "railgame123"}
+
+client = TestClient(app)
+
+
+def _authenticate() -> str:
+    response = client.post("/api/auth/login", json=AUTH_CREDENTIALS)
+    assert response.status_code == 200
+    return response.json()["accessToken"]
+
+
+def test_network_snapshot_requires_authentication() -> None:
+    response = client.get("/api/network")
+    assert response.status_code == 401
+
+
+def test_network_snapshot_endpoint_returns_collections() -> None:
+    token = _authenticate()
+    response = client.get(
+        "/api/network", headers={"Authorization": f"Bearer {token}"}
+    )
+    assert response.status_code == 200
+
+    payload = response.json()
+    assert set(payload.keys()) == {"stations", "tracks", "trains"}
+    assert all(isinstance(payload[key], list) for key in payload)
+    assert payload["stations"], "Expected sample station data"
+    assert payload["trains"], "Expected sample train data"
+
+    station = payload["stations"][0]
+    assert "name" in station and "createdAt" in station