[MIRROR] Reworks burning objects to be a component [MDB IGNORE] (#20543)

* Reworks burning objects to be a component (#74688)

## About The Pull Request

Title.

## Why It's Good For The Game

Simply put, allows for atoms which are not /obj but use atom_integrity
to burn up too, which is nice and good.
But also, it allows for neat behavior like burning particle effects
(only structures use that right now to spawn smoke)

![image](https://user-images.githubusercontent.com/82850673/231595051-2a8d0574-33cc-4cd9-9d61-65566decf4ef.png)

## Changelog

🆑
add: Burning structures spawn smoke particles. Sick.
/🆑

---------

Co-authored-by: MrMelbert <51863163+MrMelbert@ users.noreply.github.com>

* Reworks burning objects to be a component

* modular

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Co-authored-by: ChungusGamer666 <82850673+ChungusGamer666@users.noreply.github.com>
Co-authored-by: MrMelbert <51863163+MrMelbert@ users.noreply.github.com>
Co-authored-by: Tom <8881105+tf-4@users.noreply.github.com>

code/controllers/subsystem/processing/fire_burning.dm

@@ -0,0 +1,6 @@
+/// The subsystem used to tick [/datum/component/burning] instances.
+PROCESSING_SUBSYSTEM_DEF(fire_burning)
+	name = "Fire Burning"
+	priority = FIRE_PRIORITY_BURNING
+	flags = SS_NO_INIT|SS_BACKGROUND
+	runlevels = RUNLEVEL_GAME | RUNLEVEL_POSTGAME