MODsuit module update: new stuff and improved old stuff (#67042)

Doubles the range of the MOD Pathfinder AI
Fixes modules rendering below the suit.
Adds the ability for modules to be used when inactive.
Documents/cleans up some code.
Updates some old descriptions and explains some concepts better.
Armor Booster and Ash Accretion can no longer boost your speed over no slowdown at all.
Makes flashlight module start with 4 instead of 3 range, so it's better for people that don't know about configuration.
Doubles t-ray module range, from 2 to 4 (t-ray scanner is 3).
Puts the noslip module lower in progression, lowers its' price to 2.
New sprites for the magnetic harness module by Onule.
Brings back the holster module, it can now be used when the suit is inactive, can be printed with security suit research.
Adds the power kick module for the ERT Commander. It's a powerful kick.

code/modules/mod/mod_activation.dm

@@ -145,7 +145,7 @@
 			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
 		return FALSE
 	for(var/obj/item/mod/module/module as anything in modules)
-		if(!module.active)
+		if(!module.active || module.allowed_inactive)
 			continue
 		module.on_deactivation(display_message = FALSE)
 	activating = TRUE