IBX-9737: Collaboration policies described in Dev-doc

[julitafalcondusza]

Question	Answer
JIRA Ticket	(https://issues.ibexa.co/browse/IBX-9737)
Versions	4.6+

Collaboration policies described in Dev-doc

Checklist

• [ ] Text renders correctly
• [ ] Text has been checked with vale
• [ ] Description metadata is up to date
• [ ] Redirects cover removed/moved pages
• [ ] Code samples are working
• [ ] PHP code samples have been fixed with PHP CS fixer
• [ ] Added link to this PR in relevant JIRA ticket or code PR

[github-actions[bot]]

Preview of modified files

Preview of modified Markdown:

• docs/permissions/permission_use_cases.md