Linter Introduction + Cleanup (#8085)

* Adds linter defines to repo.

* Uncomments linter defines already in the code.

* Resolves unreachable code linter errors.

* Nukes decade+ old syndie specops code except for computer since that's mapped in?????

* Resolves procs has no parent linter error.

* Proc signature fixes

* Bad comments

* "In" danger

* Type safety

* Implied nested list abuse

* Top level ..() usage

* Sleepy coder typos

* Invalid kwargs calls

* Pointless returns

* Linter hacks (see full message)

Byond doesn't care and it has no effect but linter doesn't like var/proc
for holding references to procs, despite that it's valid byond code.

Also, the linter seems to have serious issues figuring out relative
proc names. This commit is a sort of take-it-or-leave-it thing. It's not
required, it just cuts down on warnings, but this code is valid DM code.

* WHATEVER THIS IS

* Trick dreamchecker linter into ignoring this file's sins in it's weird use of vars

* Fix list decoration syntax - Its a list, not list of lists

- To declare that a var is a list you can `var/list/blah = list()` syntax or the `var/blah[0]` syntax.  Both do exactly the same thing. But if you do `var/list/blah[0]` that is just like doing `var/list/list/blah = list()`

* Hopefully stops the ai holder subtype folder from going quantum and sometimes changes capitalization over time, and incidentally causing 20+ linter errors.

* Fixes unwrapped negated object in list linter error.

* Resolves colon-like list accessing linter error.

* Turns linter on in linter config.

* Fixes closet indentation properly and cleans up suit storage unit switch.

Co-authored-by: Aronai Sieyes <arokha@arokha.com>
Co-authored-by: Leshana <Leshana@users.noreply.github.com>

code/game/objects/structures/stool_bed_chair_nest/wheelchair.dm

@@ -68,7 +68,7 @@
 			user.pulledby = null
 			to_chat(user, "<span class='warning'>You lost your grip!</span>")
 		return
-	if(has_buckled_mobs() && pulling && user in buckled_mobs)
+	if(has_buckled_mobs() && pulling && (user in buckled_mobs))
 		if(pulling.stat || pulling.stunned || pulling.weakened || pulling.paralysis || pulling.lying || pulling.restrained())
 			pulling.pulledby = null
 			pulling = null
@@ -161,7 +161,7 @@
 /obj/structure/bed/chair/wheelchair/CtrlClick(var/mob/user)
 	if(in_range(src, user))
 		if(!ishuman(user))	return
-		if(has_buckled_mobs() && user in buckled_mobs)
+		if(has_buckled_mobs() && (user in buckled_mobs))
 			to_chat(user, "<span class='warning'>You realize you are unable to push the wheelchair you sit in.</span>")
 			return
 		if(!pulling)