feat：改了一大堆

backend/src/modloader/index.ts

@@ -0,0 +1,15 @@
+interface XModloader {
+  setup: Promise<void>
+}
+export function modloader(ml:string,mcv:string,mlv:string){
+ switch (ml) {
+    case "fabric":
+        break;
+    case "forge":
+        break;
+    case "neoforge":
+        break;
+    default:
+        break;
+ }
+}