feat: add drizzle configuration and initial migrations

drizzle.config.ts

@@ -0,0 +1,20 @@
+import { defineConfig } from "drizzle-kit";
+import { config } from "./src/config";
+
+export default defineConfig({
+  schema: "./src/database/schema.ts",
+  out: "./drizzle/migrations",
+  dialect: config.DATABASE_TYPE === "postgres" ? "postgresql" : "sqlite",
+  dbCredentials:
+    config.DATABASE_TYPE === "postgres"
+      ? {
+          host: config.POSTGRES_HOST,
+          port: config.POSTGRES_PORT,
+          user: config.POSTGRES_USER || "postgres",
+          password: config.POSTGRES_PASSWORD || "",
+          database: config.POSTGRES_DB || "moderation_bot",
+        }
+      : {
+          url: "./.muxer-queue.db",
+        },
+});