Reworks pAIs (#68241)

A pretty heavy refactor for pAIs that just spilled into a rework.

Attempts to fully document and organize backend code.
Fixes a large number of bugs left untouched for a decade.
Breaks down the frontend into subcomponents.
Rebalances their software modules.
(should) fix pAI faces get removed if you activate them during alert #68242

code/modules/pai/debug.dm

@@ -0,0 +1,45 @@
+/client/proc/makepAI(turf/target in GLOB.mob_list)
+	set category = "Admin.Fun"
+	set name = "Make pAI"
+	set desc = "Specify a location to spawn a pAI device, then specify a key to play that pAI"
+
+	var/list/available = list()
+	for(var/mob/player as anything in GLOB.player_list)
+		if(player.client && player.key)
+			available.Add(player)
+	var/mob/choice = tgui_input_list(usr, "Choose a player to play the pAI", "Spawn pAI", sort_names(available))
+	if(isnull(choice))
+		return
+
+	var/chosen_name = input(choice, "Enter your pAI name:", "pAI Name", "Personal AI") as text|null
+	if (isnull(chosen_name))
+		return
+
+	if(!isobserver(choice))
+		var/confirm = tgui_alert(usr, "[choice.key] isn't ghosting right now. Are you sure you want to yank them out of their body and place them in this pAI?", "Spawn pAI Confirmation", list("Yes", "No"))
+		if(confirm != "Yes")
+			return
+	var/obj/item/pai_card/card = new(target)
+	var/mob/living/silicon/pai/pai = new(card)
+
+	pai.name = chosen_name
+	pai.real_name = pai.name
+	pai.key = choice.key
+	card.set_personality(pai)
+	if(SSpai.candidates[key])
+		SSpai.candidates -= key
+	SSblackbox.record_feedback("tally", "admin_verb", 1, "Make pAI") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
+
+/**
+ * Creates a new pAI.
+ *
+ * @param {boolean} delete_old - If TRUE, deletes the old pAI.
+ */
+/mob/proc/make_pai(delete_old)
+	var/obj/item/pai_card/card = new(src)
+	var/mob/living/silicon/pai/pai = new(card)
+	pai.key = key
+	pai.name = name
+	card.set_personality(pai)
+	if(delete_old)
+		qdel(src)