docs(plugin-notes-data): add docs

packages/plugin-notes-data/README.md

@@ -16,3 +16,32 @@ module.exports = {
   // ...
 }
 ```
+
+## Options
+
+``` ts
+type NotesDataOptions = {
+  dir: string
+  link: string
+  include?: string | string[]
+  exclude?: string | string[]
+  notes: NotesItem[]
+}
+
+type NotesItem = {
+  dir: string
+  link: string
+  text: string
+  sidebar?: NotesSidebar | 'auto'
+}
+
+type NotesSidebar = (NotesSidebarItem | string)[]
+
+type NotesSidebarItem = {
+  text?: string
+  link?: string
+  dir?: string
+  collapsed?: boolean
+  items?: NotesSidebar
+}
+```