[ModernFrontEnd-001] : Add User/Collaborator with Access Rights Restriction

[samicheemagroupdocs]

This issue was originally raised via forum thread:
https://forum.groupdocs.com/t/open-annotation-in-read-only-mode/

Restrict user/collaborator as per the assigned Access Rights

[vitaliy-rezchikov]

We'll add this functionality to our Angular UI that could be used on other samples