feat: Initialize database and restructure application source code.

src/lib/env.ts

@@ -0,0 +1,17 @@
+import { z } from "zod";
+
+const envSchema = z.object({
+    DISCORD_BOT_TOKEN: z.string().optional(),
+    DISCORD_CLIENT_ID: z.string().optional(),
+    DISCORD_GUILD_ID: z.string().optional(),
+    DATABASE_URL: z.string().min(1, "Database URL is required"),
+});
+
+const parsedEnv = envSchema.safeParse(process.env);
+
+if (!parsedEnv.success) {
+    console.error("❌ Invalid environment variables:", parsedEnv.error.flatten().fieldErrors);
+    throw new Error("Invalid environment variables");
+}
+
+export const env = parsedEnv.data;