UIEXT-1404: Fix ts setup

UIEXT-1404 (Fix webapps-common typescript compile)

Author: pbaern

demo/src/vite-env.d.ts

@@ -5,3 +5,8 @@ declare module "*.vue" {
   const component: DefineComponent<{}, {}, any>;
   export default component;
 }
+
+declare module "*?raw" {
+  const string: string;
+  export default string;
+}