ERT Selectable loadouts

[Cepelinas1]

About the PR

Adds undetermined kits to ERT classes, ranging from primaries, secondaries and utility items.

Why / Balance

Noticed a trend where eventers would sometimes change loadouts or give units something extra before deployment. Got annoyed at the inconsistencies with their deployment and some of their weapon selections, so wanted to give our units options before going in.

This will probably be changed rapidly as it goes, but just wanted to post it here as a reminder for myself.

Technical details

Most of the code is from thief satchel stuff, but i'm probably going to make a specific version for ERT

Media

Todo

• [ ] Make class specific ERT loadouts for primaries
• [ ] Make class specific ERT loadouts for secondaries.
• [ ] Make class specific ERT loadouts for utility.
• [ ] Have someone sprite the funny box.
• [ ] Do some C# stuff, for the bag logic and naming (mostly around ThiefUndeterminedBackpack systems)

Requirements

• [ ] I have tested all added content and changes.
• [ ] I have added media to this PR or it does not require an ingame showcase.

Breaking changes

Changelog