Separate framework and app migrations

Also add a new develop command: clear-db.

express/develop/clear-db.ts

@@ -0,0 +1,17 @@
+import { connectionConfig, migrate, pool } from "../database";
+import { dropTables, exitIfUnforced } from "./util";
+
+async function main(): Promise<void> {
+    exitIfUnforced();
+
+    try {
+        await dropTables();
+    } finally {
+        await pool.end();
+    }
+}
+
+main().catch((err) => {
+    console.error("Failed to clear database:", err.message);
+    process.exit(1);
+});