[PORT] Port slime Geras from Den

[CliveOcelot]

About the PR

Ports the Geras ability from Den, and gives it to slime people.

Why / Balance

Makes them more unique as a species, and its neat.

Balance wise, geras does not drop items, the items are instead just left on your original body in nullspace, you revert on death/crit, have no hands, cannot vent crawl, and only have 100 hp (also fire extinguisher will kill you rather fast)

Technical details

Ported entirely from Den, namespaced it to Den as it was not namespaced on Den's repo.

Media

Dmg from one spray of fire extinguisher:

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 ingame showcase.

Changelog
🆑

• add: Ported Geras from Den, slime people can now turn into slimes at will.

[github-actions]

RSI Diff Bot; head commit 3ec3a4c merging into 57e07b5
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/_DEN/Mobs/Aliens/slimes.rsi

State	Old	New	Status
aslime_3			Added
aslime_angry			Added
aslime_mischievous			Added
blue_adult_slime			Added
blue_adult_slime_dead			Added
green_adult_slime			Added
green_adult_slime_dead			Added
rainbow_baby_slime			Added
rainbow_baby_slime_dead			Added
rainbow_slime_extract			Added
slime_geras			Added
slime_geras_eyes			Added
yellow_adult_slime			Added
yellow_adult_slime_dead			Added

Edit: diff updated after 3ec3a4c

[github-actions]

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