Added prevents of deletion of singular parent assets

[Godmartinz]

This prevents deletion of assets that are not checked out, but have assets checked out to them. Also changes the hover text to point out that the asset has other assets checked out to it. check out the image below.

The asset count is eager loaded in the api call so queries stay at a reasonable 25.

[what-the-diff]

PR Summary

• Enhanced Asset Information
  The 'Assets' section on our platform now delivers additional information by showcasing linked 'assets'. This makes it more comprehensive for users who wish to view related assets.

• Inclusion of Sub-Assets Count
  A new feature counts the number of sub-assets for any given asset. This provides a swift summary and keeps the user abreast of the hierarchy of the inventory.

• Improved Delete Logic
  We've improved how our system determines whether an asset can be safely deleted. Now, an asset cannot be erased if it has any sub-assets linked to it, reinforcing data integrity and preventing accidental deletion of nestled data.

• Upgraded Error Messaging
  Our system now uses an updated language string in the event of a user attempting to delete an asset that has sub-assets attached. This ensures clear and unambiguous communication regarding why the deletion attempt was not successful.

• Updated Tooltip Messaging for Deletion
  The tooltips for the 'delete' button now accurately reflect new rules around the deletion of an asset based on its linked sub-assets. This serves as an intuitive guide for users.