feat: initialize frontend with React, Vite, and Tailwind CSS

- Added package.json for project dependencies and scripts.
- Configured PostCSS with Tailwind CSS.
- Created main application structure with App component and routing.
- Implemented API client for handling requests with Axios.
- Developed authentication API for login, logout, and user verification.
- Created entities API for managing virtual entities.
- Implemented logs API for fetching dispatch logs.
- Added navigation bar component for app navigation.
- Created protected route component for route guarding.
- Set up global CSS with Tailwind directives.
- Configured main entry point for React application.
- Developed basic Dashboard and Login pages.
- Set up router for application navigation.
- Added Jest testing setup for testing library.
- Configured Tailwind CSS with content paths.
- Set TypeScript configuration for frontend.
- Created Vite configuration for development and production builds.
- Added Nginx configuration for serving the application and proxying API requests.

.gitignore

@@ -0,0 +1,34 @@
+# ── Environment ──────────────────────────────────────────────────────────────
+.env
+*.env.local
+
+# ── Backend (Gradle / JVM) ───────────────────────────────────────────────────
+backend/.gradle/
+backend/build/
+backend/out/
+backend/*.class
+backend/.kotlin/
+
+# ── Frontend (Node / Vite) ───────────────────────────────────────────────────
+frontend/node_modules/
+frontend/dist/
+frontend/.vite/
+
+# ── Docker ────────────────────────────────────────────────────────────────────
+docker-compose.override.yml
+
+# ── IDEs ─────────────────────────────────────────────────────────────────────
+.idea/
+*.iml
+*.iws
+.vscode/
+*.suo
+*.user
+
+# ── OS ───────────────────────────────────────────────────────────────────────
+.DS_Store
+Thumbs.db
+
+# ── Logs ─────────────────────────────────────────────────────────────────────
+*.log
+logs/