Add Ratvar (#24958)

* Create ratvar.yml

* restore balance to the universe

* scale issues

mfw nar-sie is smaller

* spawner + spawn anim

a shitty spawn anim is better than no spawn anim

* undenseify

no longer as dense as a dying neutron star

Resources/Audio/Misc/attributions.yml

@@ -18,6 +18,16 @@
   copyright: "Taken from TG station."
   source: "https://github.com/tgstation/tgstation/blob/b44fcdedfb7c7d8425bd75b9caf71644a86375d1/sound/creatures/narsie_rises.ogg"
 
+- files: ["ratvar_rises.ogg"]
+  license: "CC-BY-SA-3.0"
+  copyright: "Taken from TG station."
+  source: "https://github.com/tgstation/tgstation/blob/2f63c779cb43543cfde76fa7ddaeacfde185fded/sound/effects/ratvar_rises.ogg"
+
+- files: ["ratvar_reveal.ogg"]
+  license: "CC-BY-SA-3.0"
+  copyright: "Taken from TG station."
+  source: "https://github.com/tgstation/tgstation/blob/2f63c779cb43543cfde76fa7ddaeacfde185fded/sound/effects/ratvar_reveal.ogg"
+
 - files: ["epsilon.ogg"]
   license: "CC-BY-SA-3.0"
   copyright: "Made by dj-34 (https://github.com/dj-34)"