feat: add direct PostgreSQL and ACK deployment support

scripts/postgres-client.d.mts

@@ -0,0 +1,9 @@
+import type { Pool } from "pg";
+
+export function getScriptDataBackend(env?: NodeJS.ProcessEnv): "local" | "postgres";
+export function createPostgresPool(options?: {
+  env?: NodeJS.ProcessEnv;
+  applicationName?: string;
+}): Pool;
+export function closePostgresPool(pool?: Pool): Promise<void>;
+export function quotePostgresIdentifier(value: string): string;