Added: Manager View functionality for viewing subordinates' assets

[lukaskraic]

This PR implements a feature that allows managers to view assets assigned to their direct and indirect subordinates in their account view. This is useful for managers who need to keep track of assets used by their team.

Features

• Added a new setting to enable/disable Manager View in the admin settings
• Extended User model with methods to retrieve all subordinates recursively
• Modified ViewAssetsController to allow managers to view assets of subordinates
• Added dropdown selectors to easily switch between viewing different subordinates' assets
• Added appropriate language strings for the new feature

Implementation Details

• Uses the existing manager-subordinate relationship to build a hierarchical view
• Optimized to prevent N+1 queries by eager loading relationships
• Includes proper access control to ensure managers can only view their subordinates' assets

[welcome]

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[what-the-diff]

PR Summary

• Manager View Addition: We've incorporated a new feature that allows managers to oversee assets allocated to their team members, by integrating a 'manager_view_enabled' setting in the application.
• SettingsController Update: The functionality to store this new 'manager_view_enabled' setting has been added to the postSettings method.
• ViewAssetsController Enhancements: The feature also allows the option to select and view assets of a specific team member, and this change has been implemented in getIndex method.
• User Model Amendments: Features to manage hierarchies have been added with the new methods getAllSubordinates and isManagerOf in the User Model.
• Database Expansion: A new migration introduces the addition of 'manager_view_enabled' column in the settings database.
• Language Translation Additions: Necessary language translations for the manager view feature have also been added to relevant language files.
• Visual Interface Enhancements:
  • Changes in page layout templates enable a dropdown menu to select team members when manager view is active.
  • Settings view now includes an option to activate this manager view feature.
• Service Provider Adjustments: We've fine-tuned the AppServiceProvider to share 'subordinates' and 'settings' data across the application if the user is logged in with the manager view turned on.

[snipe]

Looks like we have some conflicts and also this might need a pull and rebase, as I'm seeing an awful lot of my own commits here. Makes it kinda hard to see which bits you changed.