Persistent trash

[FabianK3]

Summary

This PR adds trash to the persistence system.

• Trash becomes persistent the moment it is dropped unless it is dropped in a maint or the disposal room.
• It looses persistence when it lands in a maint/disposal room or gets picked up again.
• Persistent trash can be found up to three days.

Those are the base rules, some trash types have additional rules.

List of trash to be implemented:

• Basic trash (snacks and such)
  • Cigarette buts
  • spitwad
  • Burned matches
• Broken bottles
• Torn inflatable (-doors)

Littering is a i120 violation and can be punished with 3-7 minutes of prison time or with a 40-150 credit fine.
Stop littering and keep the ship clean.

Follow-up tasks

• Update GitHub Wiki: Add section on how to add persistent trash types.
• Update GitHub Wiki: Make persistence_get_content nullable/empty.

[FabianK3]

!wip

[FabianK3]

Scope freeze. List of trash types is good for the start.

Testing and refactoring.

[FabianK3]

Test cases

Subsystem specific:

• Saving of empty track content list
• Loading of empty track content list

Trash persistence specific:

• Persistence in generic areas
• Non-persistence in maints
• Non-persistence in custodial areas
• Revert of persistence on pickup

Trash type specific:

• Cigarettes
• Burned matches
• Random type of snacks
• Broken bottle
• Inflatable-/door

---

Edit: Removed energy cans and autoinjectors due to out-of scope reagent changes required. At least for now.

[FabianK3]

!review

[FabianK3]

Please update the GitHub persistency wiki page with a new version on-merge:
persistency_wiki_update_version.md
This file contains the whole new page for replacement.