Re-adds stealth ling dna sting (#19986)

Adds the DNA extraction sting which currently exists in the code to the
changeling ability store, enabling the ability in-game.

From what I can tell, the reason the ability is currently disabled is
because it originally allowed changelings to gain more ability points
without any risk, which is no longer the case as of the merging of
#17140, which made it so
that changelings only get a set amount of ability points and cannot gain
more.

DNA extraction sting in its current form does not allow changelings to
respec, that still requires changelings to absorb someone.

---------

Signed-off-by: Tag114 <[email protected]>

code/game/gamemodes/changeling/helpers/_store.dm

@@ -103,6 +103,13 @@ var/list/datum/power/changeling/powerinstances = list()
 //Stings and sting accessorries
 //Rest in pieces, unfat sting. - Geeves
 
+/datum/power/changeling/extract_dna
+	name = "Extract DNA Sting"
+	desc = "We silently sting a human and copy their DNA, allowing us to mimic their form."
+	genomecost = 0
+	allowduringlesserform = TRUE
+	verbpath = /mob/proc/changeling_extract_dna_sting
+
 /datum/power/changeling/boost_range
 	name = "Boost Range"
 	desc = "We evolve the ability to shoot our stingers at humans, with some preperation."

html/changelogs/tag114-dnasting.yml

@@ -0,0 +1,6 @@
+author: Tag114
+
+delete-after: True
+
+changes:
+  - rscadd: "Re-enables the ability for changelings to stealthily extract DNA from targets by stinging them."