Changes all .len to length() where applicable (#25174)

* Globals work

* Double access works

* All other things

* Revert "All other things"

This reverts commit 6574442eb6.

* More changes that compile and work

* IT WORKS AAAAAA

* Changes even more .len to length()

* Apply suggestions from code review

* Update code/datums/mind.dm

* Update code/__HELPERS/sorts/InsertSort.dm

Co-authored-by: Deniz <66401072+Oyu07@users.noreply.github.com>

* Update code/__HELPERS/sanitize_values.dm

Co-authored-by: Deniz <66401072+Oyu07@users.noreply.github.com>

---------

Co-authored-by: FunnyMan3595 (Charlie Nolan) <funnyman@google.com>
Co-authored-by: Deniz <66401072+Oyu07@users.noreply.github.com>

code/game/objects/items/devices/enginepicker.dm

@@ -49,7 +49,7 @@
 	var/G						//Generator that will be spawned
 	var/turf/T = get_turf(choice)
 
-	if(choice.enginetype.len > 1)	//If the beacon has multiple engine types
+	if(length(choice.enginetype) > 1)	//If the beacon has multiple engine types
 		var/E = tgui_input_list(user, "You have selected a combined beacon, which option would you prefer?", "[src]", choice.enginetype)
 		if(E)
 			engtype = E
@@ -76,7 +76,7 @@
 		var/ailist[] = list()
 		for(var/mob/living/silicon/ai/A in GLOB.alive_mob_list)
 			ailist += A
-		if(ailist.len)
+		if(length(ailist))
 			var/mob/living/silicon/ai/announcer = pick(ailist)
 			announcer.say(";Engine delivery detected. Type: [engtype].")	//Let's announce the terrible choice to everyone