[FEATURE] add the possibility for a readonly block

[Xusifob]

Is this a unique feature?

• [x] I have checked "open" AND "closed" issues and this is not a duplicate

Is your feature request related to a problem/unavailable functionality? Please describe.

I would like to add some "readonly" blocks that will be inserted in the middle of the editable content

We've dis used about it in the discord channel

Proposed Solution

I haven't had time to look at it, but I'll fill in this section later

Screenshots

No response

Do you want to work on this issue?

No

If "yes" to the above, please explain how you would technically implement this (issue will not be assigned if this is skipped)

No response