Create user permission to allow... managing user permissions

[snipe]

Inception!

This is a stab at a PR that would limit users who can create/edit users from being able to assign individual permissions to those users. (As it stands, only superadmins can manage group memberships). More testing needed, but I think this is the right track.

[shortcut-integration]

This pull request has been linked to Shortcut Story #24359: Add additional permission that allows/disallows editing user permissions.

[what-the-diff]

PR Summary

• Improved Security on User Permissions
  In the UsersController sections for both Api and Users, added ability to check if a user has permissions for modifying other users' permissions. This addition helps to ensure that only authorized individuals can make such changes, improving overall system security.

• Streamlined Image Handling Process
  The logic on how we handle images in ImageUploadRequest is now more neat and concise with the removal of an "else" statement. This change makes the image handling process more efficient.

• Enhanced Permission Management System
  A new permissions method was added to SnipePermissionsPolicy. Furthermore, a new permission identifier users.manage_permissions has been added to both the authentication service provider and the permissions config file. This implies more granularity and better management in controlling access to different system resources.

• Permission-based View Modifications
  Made changes to the user interface views permissions-base.blade and edit.blade to only show certain sections like the 'permissions tab' and 'permissions section' to users that have the users.manage_permissions permission. This helps ensure that users only see options that they have the access rights to use, making the user interface more intuitive.