support marks on element nodes

[Pruxis]

Issue 1: https://github.com/yjs/y-prosemirror/issues/47 Issue TipTap: https://github.com/ueberdosis/tiptap/issues/4339

PR 1: https://github.com/yjs/y-prosemirror/pull/63 PR 2: https://github.com/yjs/y-prosemirror/pull/135

But updated so that it works to parse yDoc to JSON aswell.

I made sure that the tests run and formatting run green, if anything else is a concern feel free to let me know I will change as soon as possible

[nperez0111]

Hi @dmonad, as I understand it you wanted to add some tests for this. I had a hand in making this change and am willing to add tests if you find it necessary.

[Pruxis]

Anything pending to get this merged?

[aoruize]

Please get this merged 🙏🏼 🙏🏼 😭 😮‍💨