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/_helpers/unsorted.dm

@@ -19,11 +19,9 @@
 
 	if (!( istext(HTMLstring) ))
 		CRASH("Given non-text argument!")
-		return
 	else
 		if (length(HTMLstring) != 7)
 			CRASH("Given non-HTML argument!")
-			return
 	var/textr = copytext(HTMLstring, 2, 4)
 	var/textg = copytext(HTMLstring, 4, 6)
 	var/textb = copytext(HTMLstring, 6, 8)
@@ -40,7 +38,6 @@
 	if (length(textb) < 2)
 		textr = text("0[]", textb)
 	return text("#[][][]", textr, textg, textb)
-	return
 
 //Returns the middle-most value
 /proc/dd_range(var/low, var/high, var/num)
@@ -1129,8 +1126,6 @@ proc/is_hot(obj/item/W as obj)
 		else
 			return 0
 
-	return 0
-
 //Whether or not the given item counts as sharp in terms of dealing damage
 /proc/is_sharp(obj/O as obj)
 	if(!O)