feat(altyapı): yerel MongoDB, Axum backend ve Vite frontend iskeleti

- docker-compose.dev.yml: MongoDB 7, tek düğümlü replica set (port 27020)
- Backend: Axum + tokio, GET /api/health
- Frontend: React + TypeScript + Vite, /api proxy, geçici durum ekranı
- Kök package.json: npm run dev ile DB + backend + frontend
- backend/api.http örnek istekler

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/.oxlintrc.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["react", "typescript", "oxc"],
+  "rules": {
+    "react/rules-of-hooks": "error",
+    "react/only-export-components": ["warn", { "allowConstantExport": true }]
+  }
+}