Introduce user permissions to the UserController with corresponding tests. Define permissions for each controller function as follows:

• index(): list-users
• store(): create-users
• show():
  • For viewing own user: show-users
  • For viewing all users: list-users
• update():
  • For updating all users: update-users
  • For updating own user: update-users-self
• destroy(): delete-users

This update ensures that user controller functions are now restricted and accessible based on the specified permissions. The associated tests validate the correct implementation of these permissions.