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/stations.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import sqlalchemy as sa
+from sqlalchemy.orm import Session
+
+from geoalchemy2.elements import WKTElement
+
+from backend.app.db.models import Station
+from backend.app.repositories.base import BaseRepository
+from backend.app.models import StationCreate
+
+
+class StationRepository(BaseRepository[Station]):
+    model = Station
+
+    def __init__(self, session: Session) -> None:
+        super().__init__(session)
+
+    def list_active(self) -> list[Station]:
+        statement = sa.select(self.model).where(self.model.is_active.is_(True))
+        return list(self.session.scalars(statement))
+
+    @staticmethod
+    def _point(latitude: float, longitude: float) -> WKTElement:
+        return WKTElement(f"POINT({longitude} {latitude})", srid=4326)
+
+    def create(self, data: StationCreate) -> Station:
+        station = Station(
+            name=data.name,
+            osm_id=data.osm_id,
+            code=data.code,
+            location=self._point(data.latitude, data.longitude),
+            elevation_m=data.elevation_m,
+            is_active=data.is_active,
+        )
+        self.session.add(station)
+        return station