Add local test data, implement [id].tsx for approval workflows

src/utils/approval.workflows.be.ts

@@ -0,0 +1,8 @@
+import { ApprovalWorkflow } from "@/interfaces/approval.workflow";
+import client from "@/lib/mongodb";
+
+const db = client.db(process.env.MONGODB_DB);
+
+export const getApprovalWorkflow = async (id: string) => {
+	return await db.collection("approval-workflows").findOne<ApprovalWorkflow>({ id });
+};