firefighter backpack

[marc-pelletier]

About the PR

Brings over the firefighter backpack and adds them to atmos lockers.

Why / Balance

Content migration

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an in-game showcase.
• If I am porting something, I have done my best to respect the appropriate licenses associated with the presented changes.

License

MIT

Breaking changes

Slightly modifies SpraySystem and SlotBasedConnectedContainerSystem

Changelog
🆑

• add: The firefighter backpack, a tool used for fire suppression and atmospheric maintenance can be found in atmospheric technician's lockers.

[github-actions]

RSI Diff Bot; head commit b6e572d merging into bfaba37
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/_Funkystation/Clothing/Back/Backpacks/atmosbackpacktank.rsi

State	Old	New	Status
equipped-BACKPACK			Added
icon			Added
inhand-left			Added
inhand-right			Added

Resources/Textures/_Funkystation/Effects/resin.rsi

State	Old	New	Status
resin-dissolve			Added
resin-east			Added
resin-north			Added
resin-south			Added
resin-west			Added
resin			Added

Resources/Textures/_Funkystation/Objects/Weapons/Grenades/frozen-smoke-capsule.rsi

State	Old	New	Status
equipped-BELT			Added
icon			Added
primed			Added

Resources/Textures/_Funkystation/Objects/Weapons/Guns/Basic/extinguishernozzle.rsi

State	Old	New	Status
icon			Added
inhand-left			Added
inhand-right			Added

Edit: diff updated after b6e572d