## About The Pull Request
Partial revert of #86701
Implements a shared holder particle system, somewhat inspired by
https://github.com/Baystation12/Baystation12/pull/34014 (thanks Kapu).
Atoms can be assigned "shared" particles via add_shared_particles, with
an optional "alternate" key passed as a second arg if you're planning to
edit the returned particle holder (for example, color it like slimed
status does). Removing is done via remove_shared_particles with an
option to delete the shared holder if nothing is using it anymore (on by
default). This system should be prioritized over normal particle holders
when a lot of entities would be using a certain particle effect (like
fires) as it conserves a lot of clientside performance.
Burning, acid, decaying, firestacks and slimed status now use this
system which should help with clientside performance and amount of atoms
created/destroyed.
## Why It's Good For The Game
Less clientside lag.
## Changelog
🆑
refactor: Firestacks, burning/acid/decaying effects and (brought back
after being temporarily removed) slimed status effects now use a new
"shared" particles system, which should considerably improve client
performance when encountering a lot of burning/slimed entities.
/🆑
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Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>
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