feat: add notebook widget (#294)

* feat: add nestjs replacement, remove nestjs

* feat: add notebook widget

* fix: format issue

* fix: add missing tiptap packages

* refactor: improve structure of table options

* fix: downgrade to tiptap 2.2.5 as not yet supported by mantine/tiptap

* fix: format issue

* fix: deepsource issues

* fix: typecheck issues

* refactor: move default notebook content to seperate file

* fix: format issue

packages/definitions/src/widget.ts

@@ -4,5 +4,6 @@ export const widgetKinds = [
   "app",
   "iframe",
   "video",
+  "notebook",
 ] as const;
 export type WidgetKind = (typeof widgetKinds)[number];