Minor dionae changes (#10325)

* Adds a refine for the eternal

* adds the book sprite

* actually adds the eternal's burble sprite

* adds a dionae religion file.

* adds a include for the dionea religion stuff

* adds the allowed religion

* changes the dionae blurb to be more up to date

* fixes some issues

* fixes some more stuff

* changelog

* alphabetical order

* Yonni has small brain and didn't put it in the right order again

code/modules/background/defines.dm

@@ -48,6 +48,8 @@
 #define RELIGION_PREIMMINENNCE "Preimminennce"
 #define RELIGION_PILOTDREAM "Pilot Dream"
 
+#define RELIGION_ETERNAL "The Eternal"
+
 //accent defines
 
 #define ACCENT_CETI "Biesellite"

code/modules/background/religion/diona.dm

@@ -0,0 +1,10 @@
+/datum/religion/eternal
+  name = RELIGION_ETERNAL
+  description = "Followers of The Eternal believe that a primordial entity exists in Light, Energy and Essence - which the Dionae are the embodiment of. \
+  They believe that the Dionae were made to ensure that all things born from the stars return to stars, eventually. Before they may return the Dionae must devour as much knowledge \
+  and biomass as they can, growing exponentially until they reach the mythical Titan form, becoming a star once more. Transcended into a star, the Dionae will emit light and energy \
+  until they die, at which point their essence will spread across the void to birth new Dionae. It is in this way that the eternal cycle is achieved. Scholars of the Eternal link \
+  this to the very real potential outcome of Titan form Dionae which theoretically could grow to such mass as to collapse into a star, thus giving off light and energy before \
+  eventually going supernova and expelling matter or essence across the cosmos."
+  book_name = "book of the eternal"
+  book_sprite = "eternal"