Adds Purchasable Arena Mob Crates

[IamVelcroboy]

About the PR

• Adds 3 constructable plasteel livestock crates (standard, secure, reinforced secure)
• Adds 2 arena mob crates for sale in cargo (small mob, large mob)

Why / Balance

For purchase in Arena station (or potentially other makeshift arena/entertainment situations)

Technical details

Arena mob crates are armory locked

Media

Requirements

• I have tested all added content and changes.
• I have added media to this PR or it does not require an in-game showcase.

Breaking changes

n/a

Changelog
🆑 Velcroboy

• add: Additional aggressive mobs can now be purchased for Arena Station. Caution is advised.

[github-actions]

RSI Diff Bot; head commit 418c012 merging into 83ef515
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/_DV/Structures/Storage/Crates/livestock_reinforced.rsi

State	Old	New	Status
DamageOverlay_75			Added
base			Added
closed			Added
icon			Added
locked			Added
open			Added
sparking			Added
unlocked			Added
welded			Added

Resources/Textures/_DV/Structures/Storage/Crates/livestock_secure.rsi

State	Old	New	Status
base			Added
closed			Added
icon			Added
locked			Added
open			Added
sparking			Added
unlocked			Added
welded			Added

Resources/Textures/_DV/Structures/Storage/Crates/livestock_steel.rsi

State	Old	New	Status
base			Added
closed			Added
icon			Added
open			Added
welded			Added

Edit: diff updated after 418c012

[Radezolid]

Holy shit, thanks. No more faxing CC for more mobs.

[Avalon-Proto]

Initial infected gonna go crazy with these :blunt:

[deltanedas]

cargo fishops and xeno agent gameplay

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.