Invalid access: Add Yjs type to a document before reading data (yjs > =13.6.20)

[RubaXa]

Hi, currently when using yjs >= 13.6.20, warnings start to appear because there is an attempt to use SharedType without a ydoc:

https://docs.yjs.dev/getting-started/working-with-shared-types#caveats

[doodlewind]

Fixed in #8519