Has permission endpoint

[Mateusz-Dobrzynski]

TO-DO:

• Create a GET /user/{id}/has_permission endpoint for checking permissions analogous to the has_permission method (e.g. /user/{id}/has_permission?permission_name=WriteTeams);
• The endpoint returns a boolean value;
• The endpoint can only be utilized by authenticated users;
• When receiving a request regarding a nonexistent permission, 404 is returned.

How to test:

• Create a user with and grant them a permission.
• Make a request regarding a permission they have, one they don't, and one that does not exist. Check if responses match expected values.