Mess tech scaling (#4983)

# About the pull request

This PR adds scaling to allow for an extra mess tech slot once there are
70 marines playing.

This is a paid code request from a player.

# Explain why it's good for the game

Mess tech can be a lonely job and it can spice things up to have a
partner in the culinary arts.

# Testing Photographs and Procedure

I spawned in as a mess tech.

I then created 50 marines and checked if I could spawn in as a mess
tech. As expected the answer was no.

I then creates 20 more marines and checked if I could spawn in as a mess
tech and could.


# Changelog

:cl: Morrow
add: Mess tech positions now scale from 1 to 2 after 70 marines are in
the game
/:cl:

---------

Co-authored-by: BeagleGaming1 <[email protected]>

code/game/jobs/job/civilians/other/mess_seargent.dm

@@ -1,13 +1,31 @@
 /datum/job/civilian/chef
 	title = JOB_MESS_SERGEANT
-	total_positions = 1
+	total_positions = 2
 	spawn_positions = 1
+	allow_additional = TRUE
+	scaled = TRUE
 	selection_class = "job_ot"
 	flags_startup_parameters = ROLE_ADD_TO_DEFAULT
 	supervisors = "the auxiliary support officer"
 	gear_preset = /datum/equipment_preset/uscm_ship/chef
 	entry_message_body = "<a href='"+WIKI_PLACEHOLDER+"'>Your job is to service the marines with excellent food</a>, drinks and entertaining the shipside crew when needed. You have a lot of freedom and it is up to you, to decide what to do with it. Good luck!"
 
+/datum/job/civilian/chef/set_spawn_positions(count)
+	spawn_positions = mess_sergeant_slot_formula(count)
+
+/datum/job/civilian/chef/get_total_positions(latejoin = FALSE)
+	var/positions = spawn_positions
+	if(latejoin)
+		positions = mess_sergeant_slot_formula(get_total_marines())
+		if(positions <= total_positions_so_far)
+			positions = total_positions_so_far
+		else
+			total_positions_so_far = positions
+	else
+		total_positions_so_far = positions
+
+	return positions
+
 /obj/effect/landmark/start/chef
 	name = JOB_MESS_SERGEANT
 	icon_state = "chef_spawn"

code/game/jobs/slot_scaling.dm

@@ -50,3 +50,6 @@
 
 /proc/working_joe_slot_formula(playercount)
 	return job_slot_formula(playercount,30,1,3,6)
+
+/proc/mess_sergeant_slot_formula(playercount)
+	return job_slot_formula(playercount, 70, 1, 1, 2)