Bools and returns super-pr (#53221)

Replaces like 70-80% of 0 and such, as a side effect cleaned up a bunch of returns
Edit: Most left out ones are in mecha which should be done in mecha refactor already
Oh my look how clean it is

Co-authored-by: TiviPlus <TiviPlus>
Co-authored-by: Couls <coul422@gmail.com>

code/modules/admin/secrets.dm

@@ -95,7 +95,7 @@
 
 /datum/admins/proc/Secrets_topic(item,href_list)
 	var/datum/round_event/E
-	var/ok = 0
+	var/ok = FALSE
 	switch(item)
 		if("admin_log")
 			var/dat = "<B>Admin Log<HR></B>"
@@ -290,7 +290,7 @@
 			for(var/i in GLOB.human_list)
 				var/mob/living/carbon/human/H = i
 				INVOKE_ASYNC(H, /mob/living/carbon.proc/monkeyize)
-			ok = 1
+			ok = TRUE
 
 		if("allspecies")
 			if(!check_rights(R_FUN))
@@ -709,7 +709,7 @@
 			to_chat(world, text("<B>A secret has been activated by []!</B>", usr.key), confidential = TRUE)
 
 /proc/portalAnnounce(announcement, playlightning)
-	set waitfor = 0
+	set waitfor = FALSE
 	if (playlightning)
 		sound_to_playing_players('sound/magic/lightning_chargeup.ogg')
 		sleep(80)