Design how multiple loadouts are displayed in the app (Active loadout)

[captainsandypants]

Currently they are shown in the spine, but design never had time dedicated to fully think and design this through.
There are issues regarding visibility of the currently Active loadout, this is relevant for

• Automatic installation of completed downloads
• Ingestion of outside changes
• Transparency about what is currently on disk (loadout B, but without the unapplied changes).

We should keep in mind that users can have multiple windows open at the same time, each viewing a different loadout, so just selecting a loadout should not be enough to make it the "Active" one.

We also established before that each loadout would have a separate workspace. It should not be possible to have the modlist or the diagnostics of of LoadoutA show up in the workspace for LoadoutB, as that would be very confusing for users.

Design

https://www.figma.com/file/TbJiArfCPTv9fQFIEPuwd5/%F0%9F%93%B1-Loadouts?type=design&node-id=67%3A3595&mode=design&t=lkBadJsMn6yv9fem-1

20240502-1027-39.6332590.mp4