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/app/repositories/__init__.py

@@ -0,0 +1,11 @@
+"""Repository abstractions for database access."""
+
+from backend.app.repositories.stations import StationRepository
+from backend.app.repositories.tracks import TrackRepository
+from backend.app.repositories.trains import TrainRepository
+
+__all__ = [
+    "StationRepository",
+    "TrackRepository",
+    "TrainRepository",
+]