feat: add widget preview pages (#9)

* feat: add widget definition system

* fix: wrong typecheck command in turbo generator

* chore: fix formatting

* feat: add widget preview page

* chore: fix formatting and type errors

* chore: fix from widget edit modal and remove some never casts

* chore: address pull request feedback

apps/nextjs/src/app/[locale]/_client-providers/modals.tsx

@@ -0,0 +1,9 @@
+"use client";
+
+import type { PropsWithChildren } from "react";
+
+import { ModalsManager } from "../modals";
+
+export const ModalsProvider = ({ children }: PropsWithChildren) => {
+  return <ModalsManager>{children}</ModalsManager>;
+};