[FR] Permissions - View/Comment Access for Created or Watching Issues/User Stories Only (not all)

[cerealkella]

Please describe the problem / need you are trying to solve.
One of the ways my team uses taiga is as a help desk ticketing/tracking system. It wasn't necessarily built for this, but all-in-all, it works great for this purpose! We'd like to have one more permissions level: where the owner of an issue/user story can see only the issues/user story they own/create.

Describe the feature or the improvement you'd like and what are you trying to achieve.
Instead of logging in and seeing all or none of the issues, a user would log in and be able to see the issues they created or, if they are added as a watcher, they could also see those. I'd probably want to allow the user to make comments on these also if they have this permission level. This would be helpful for quicker communication with teams and end-users. Right now we are manually emailing updates as we work through issues and user stories.

Describe alternatives you've considered
I've considered using the API to build out my own implementation of this in a web app or desktop app but a user could login to taiga via the web and see things that do not pertain to them, or complain that their issues are not being prioritized over others.

Additional context
I understand this might be an edge case? Maybe there are others who could benefit from this also. There would need to be front-end changes made to accommodate this as well.