feat: Initialize database and restructure application source code.

src/lib/DrizzleClient.ts

@@ -0,0 +1,9 @@
+import { drizzle } from "drizzle-orm/bun-sql";
+import { SQL } from "bun";
+import * as schema from "@db/schema";
+import { env } from "@lib/env";
+
+const connectionString = env.DATABASE_URL;
+const postgres = new SQL(connectionString);
+
+export const DrizzleClient = drizzle(postgres, { schema });