Refactor VM and Plugin Management

- Removed the `plugins.constants.ts` file as it was no longer needed.
- Updated the `vm.class.ts` to improve result handling and logging.
- Introduced `vm.constants.ts` to manage registered plugins and modules.
- Simplified the test payload in `case1-payload.js` by removing unnecessary insert logic.
- Enhanced `case1.ts` to include database and migration setup, improving test clarity.
- Deleted unused functions for adding modules and plugins, streamlining the codebase.

src/vm/vm.constants.ts

@@ -0,0 +1,26 @@
+import { QueryExecuterService } from "src/query/executer/query.executer.service";
+import { DatabasePlugin } from "./plugins/database.plugin";
+import { Query } from "src/query/entities/query.entity";
+
+export const registeredPlugins = {
+  db: {
+    class: DatabasePlugin,
+    initMethod: async (service: QueryExecuterService, query: Query) => {
+      const databaseConnection =
+        await service.databaseManagerService.getConnectionOptions(
+          query.project.id
+        );
+
+      if (!databaseConnection) {
+        throw new Error("Database connection not found");
+      }
+
+      return DatabasePlugin.init("db", databaseConnection);
+    },
+  },
+};
+
+export const registeredModules = {
+  squel: "dist/vm/modules/squel.js",
+  asyncCall: "dist/vm/modules/async.js",
+};