Adds a bloodwriting ability to the revenant, that functions like an innate red crayon (#5116)

## About The Pull Request
Adds a free ability to the revenant, which allows them to write messages
and draw runes as if they had a crayon. clicking the ability button
opens the crayon menu, and clicking around allows the revenant to draw
what was selected

## Why It's Good For The Game
Encourages roleplay with revenants and gives them something to do if
they can't get their hands on enough corpses

## Proof Of Testing
<details>
<summary>Screenshots/Videos</summary>
<img width="1848" height="1354" alt="image"
src="https://github.com/user-attachments/assets/379d1bfa-3c18-4574-b51c-6359168e9f3c"
/>


</details>

## Changelog
🆑
add: Added a bloodwriting ability to the revenant that works like a
built-in crayon
/🆑

---------

Co-authored-by: tgstation-ci[bot] <179393467+tgstation-ci[bot]@users.noreply.github.com>
Co-authored-by: Alexis <catmc8565@gmail.com>

code/modules/mob/living/basic/space_fauna/revenant/_revenant.dm

@@ -73,6 +73,7 @@
 		/datum/action/cooldown/spell/aoe/revenant/malfunction,
 		/datum/action/cooldown/spell/aoe/revenant/overload,
 		/datum/action/cooldown/spell/list_target/telepathy/revenant,
+		/datum/action/cooldown/spell/pointed/revenant/bloodwriting, //BUBBER ADDITION
 	)
 
 	/// The resource, and health, of revenants.
@@ -202,6 +203,10 @@
 	relay_to_list_and_observers(rendered, GLOB.revenant_relay_mobs, src)
 
 /mob/living/basic/revenant/ClickOn(atom/A, params) //revenants can't interact with the world directly, so we gotta do some wacky override stuff
+	//BUBBER ADDITION START
+	if(check_click_intercept(params,A) || HAS_TRAIT(src, TRAIT_NO_TRANSFORM))
+		return
+	//BUBBER ADDITION END
 	var/list/modifiers = params2list(params)
 	if(LAZYACCESS(modifiers, SHIFT_CLICK))
 		ShiftClickOn(A)