refactor: use graasp button

[pyphilia]

This PR updates some properties in TextEditor / DocumentItem corresponding to the changes in graasp-ui.
It also removes all buttons to use the Button in @graasp/ui.

close #304

[alvrba]

I have tested graasp-compose and graasp-ui, and the buttons are working fine. I have two doubts:

• Do we want to change all the buttons to the graasp-ui button? For example, in the NewButtonItem component, we are still using the material-ui button directly.
• Graasp-compose is crashing when creating a new item of type File or Import APP. I see the uppy module has been updated to a recent version, and I have tried with the previous one, but it is still giving me the error. I do not know if maybe it is my local problem because I need something else (but it works fine with the Graasp compose in main). Can you check if it is working for you?

[pyphilia]

@alvrba Indeed you're right, the app is crashing (I did it quite quickly yesterday). The problems comes from both react-scripts v5 and uppy facebook/create-react-app#12021 I've downgraded react-scripts. Though the whole idea was to remove the security alerts but I guess we will keep them for the time being.

And we want to replace all the buttons yes!