Enhancement: render document notes as markdown (#14626)

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Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src-ui/src/app/data/document-note.ts

@@ -1,8 +1,14 @@
 import { ObjectWithId } from './object-with-id'
 import { User } from './user'
 
+export enum NoteFormat {
+  Plain = 'plain',
+  Markdown = 'markdown',
+}
+
 export interface DocumentNote extends ObjectWithId {
   created?: Date
   note?: string
   user?: User
+  format?: NoteFormat
 }