Adds a function to grant research points for slime extracts (#48807)

* Adds a function to grant research points for slime cores

* I meant to change it to 1k points before pushing

* changes slimes so they give different points based on what tier they're on

* A few fixes and more efficient code

* Adds sanity checks, used extracts can't be cashed in

* Refactored code

code/controllers/subsystem/research.dm

@@ -30,6 +30,7 @@ SUBSYSTEM_DEF(research)
 	)
 	var/list/errored_datums = list()
 	var/list/point_types = list()				//typecache style type = TRUE list
+	var/list/slime_already_researched = list() 	//Slime cores that have already been researched
 	//----------------------------------------------
 	var/list/single_server_income = list(TECHWEB_POINT_TYPE_GENERIC = 52.3)
 	var/multiserver_calculation = FALSE