Moves and documents AI's definition (+ minor cleanup) (#88928)

## About The Pull Request

The AI's definition is big and unorganized, which makes figuring out
what does what really annoying, so I took the time to document and
organize the file

Some vars have been renamed to better communicate what they actually do
when reading code
Unused vars have been deleted:
* var/chnotify
* var/waypoint
* var/interfaceButton

### Misc changes:
The check to see if malf modules could be used was written incorrectly,
and therefore all malf modules could be used without cooldown. The check
has been fixed, so actions which used to have no cooldown should now

AI bot summoning was supposed to have a cooldown, but it was broken and
not implemented for basic bots. This has been removed instead of fixed,
since I found it was an unnecessary limitation for something so simple.

## Changelog

🆑
fix: Malf modules correctly use action cooldown (affects camera repair
and detonate RCDs)
code: Minor (extremely minor) AI code maintenance
/🆑

code/modules/mob/eye/camera/camera.dm

@@ -13,7 +13,7 @@
 	var/use_visibility = TRUE
 	/// List of [camera chunks][/datum/camerachunk] visible to this camera.
 	/// Please don't interface with this directly. Use the [cameranet][/datum/cameranet].
-	var/final/list/datum/camerachunk/visibleCameraChunks = list()
+	VAR_FINAL/list/datum/camerachunk/visibleCameraChunks = list()
 	/// NxN Range of a single camera chunk.
 	var/static_visibility_range = 16