feat: restructure backend with Elysia framework and add MQTT adapter

- Updated .gitignore to exclude generated files and database
- Modified package.json to change dev script and add new dependencies
- Removed src/index.ts and created app.ts for Elysia server initialization
- Added environment variable configuration in config/env.ts
- Implemented MQTT adapter in adapter/mqtt.ts for message handling
- Created Prisma client in prisma/client.ts and defined schema in prisma/schema.prisma
- Added seeding script in prisma/seed.ts for measurement points
- Established logging utility in utils/logger.ts for structured logging
- Created bed router in routes/bed.ts for handling bed-related routes

app.ts

@@ -0,0 +1,39 @@
+import { Elysia } from 'elysia';
+import { cors } from '@elysiajs/cors';
+
+import { createTopicLogger } from '~/utils/logger';
+import env from './config/env';
+
+async function initialize() {
+  const logger = createTopicLogger({ topic: 'Initializer' });
+  try {
+    await initializeElysia();
+  } catch (error) {
+    logger.error(`Initialization error: ${error}`);
+    process.exit(1);
+  }
+
+}
+
+async function initializeElysia() {
+  const logger = createTopicLogger({ topic: 'Elysia' });
+  const PORT = env.BACKEND_PORT;
+
+  // Instantiate and configure Elysia
+  const app = new Elysia()
+    // Logging Messages
+    .onStart(() => {
+      logger.info(`API server starting on port ${PORT}`);
+    })
+    .onStop(() => {
+      logger.info('API server shutting down');
+    })
+
+    // Core Components
+    .use(cors())
+
+  // Start the server
+  app.listen(PORT);
+}
+
+initialize();