feat: 使App.vue和VirtualDirectory解耦

src/hooks/useRootVDirectory.ts

@@ -0,0 +1,17 @@
+import VirtualDirectory from "@/class/VirtualDirectory";
+import { reactive } from "vue";
+
+const root = reactive(
+    new VirtualDirectory({
+        name: '根目录',
+        stats: {
+            atimeMs: 0,
+            birthtimeMs: 0,
+            ctimeMs: 0,
+            mtimeMs: 0
+        }
+    })
+)
+export default function useRootVDirectory() {
+    return root;
+}