fix(ui): add vitest.config.ts to prevent loading vite.config.ts with TypeScript 7 incompatible dts plugin

packages/ui/vitest.config.ts

@@ -0,0 +1,8 @@
+import { defineProject } from "vitest/config";
+
+export default defineProject({
+  test: {
+    name: "@meshtastic/ui",
+    include: [],
+  },
+});