[Feature Request] Command to add `ModelActivityOperation` and/or `EntryActivityOperation` to CrudControllers

[tabacitu]

I want this package to make it easier for me to use ModelActivityOperation and EntryActivityOperation on my CrudControllers.

I want to run php artisan backpack:activity-log:inject-operation, and it will go through all CrudControllers and inject the operation trait.

Possible attributes:

• php artisan backpack:activity-log:inject-operation --operation='Backpack\..\ModelActivityOperation'
• php artisan backpack:activity-log:inject-operation --controller-path='App\DifferentControllerPath\'
• php artisan backpack:activity-log:inject-operation --ask - would ask me for each CrudController, if I want to add yes/no

That would make it MUCH simpler to install this package.