IPCs cant be cultists (#4711)

Implements https://forums.aurorastation.org/viewtopic.php?f=18&t=11130

code/game/antagonist/station/cultist.dm

@@ -35,6 +35,16 @@ var/datum/antagonist/cultist/cult
 
 	faction = "cult"
 
+	restricted_species = list(
+		"Baseline Frame",
+		"Shell Frame",
+		"Hephaestus G1 Industrial Frame",
+		"Hephaestus G2 Industrial Frame",
+		"Xion Industrial Frame",
+		"Zeng-Hu Mobility Frame",
+		"Bishop Accessory Frame"
+	)
+
 	var/allow_narsie = 1
 	var/datum/mind/sacrifice_target
 	var/list/allwords = list("travel","self","see","hell","blood","join","tech","destroy", "other", "hide")

code/game/gamemodes/cult/runes.dm

@@ -133,6 +133,11 @@ var/list/sacrificed = list()
 				target.hallucination = min(target.hallucination, 500)
 			return 0
 
+		//If you dont have blood, blood magic doesnt work on you
+		if(target.is_mechanical())
+			attacker << "<span class='danger'>You sense that your powers can not effect them.</span>"
+			return 0
+
 		target.take_overall_damage(0, rand(5, 20)) // You dirty resister cannot handle the damage to your mind. Easily. - even cultists who accept right away should experience some effects
 		// Resist messages go!
 		if(initial_message) //don't do this stuff right away, only if they resist or hesitate.

html/changelogs/arrow768-noipccult.yml

@@ -0,0 +1,37 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#################################
+
+# Your name.  
+author: Arrow768
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - tweak: "IPCs can no longer be converted to cultists."