Add different view modes for resource lists

[jrauh01]

This PR introduces new view modes for resource lists to enhance the user experience, following the approach used in icingadb-web. The implemantation includes three view modes:

• minimal: display the most essential information in one line
• common: like minimal, but additionally has a footer with further information
• detailed: like common, but the information is spreaded over three lines

If a resource does not provide sufficient information for a more detailed view, the corresponding options in the view mode switcher will not be available.

[jhoxhaa]

Could you please clarify a few things:

What are the main changes introduced in this PR?
Is there anything specific you'd like me to review or pay extra attention to?

[jrauh01]

I've updated the PR description to show the main changes. I think there's nothing specific that requires extra attention.

[jhoxhaa]

Please use only one class instead of three (*ListItem, *ListItemMinimal, *ListItemDetailed) to handle the different levels of detail for displaying resource information.

Also use the ViewMode trait in the BaseItemList.php and BaseItemList.php instead of using it in all the other List classes.

[jrauh01]

I placed the constants in ViewModeSwitcher instead, because I think they fit better there.