Robot_module and cyborg stack refactor (#13527)

* robot_module refactor

* some fixes

1. adds medical stacks of 25 for the syndi medical borg
2. fixes various construction steps that weren't using `use()` or `get_amount()`

* review tweaks + other stuff

1. Makes a bunch of for loops into istypeless loops
2. Adds a readout of the current out of stacks a borg has, in the status panel
3. Slightly reorganizes the medical, syndi medical, engineering and syndi engineering cyborgs items

* fixes after upstream merge

* blank line for travis

* fixes and improvements

1. Fixed welder icon's not updating periodically if you were charging in a borg recharger
2. Fixes solar panels dropping /cyborg type glass when they were deconstructed.
3. Band-aid fix (incase #2 doesn't fix this) for cyborg stack's `source` var being null which resulted in tons of "cannot read null.energy" runtimes

* more fixes + constructable frame runtime fix

* removes toy sword placeholder

remove comment

* remove these as well

* .amount to .get_amount(), really should have done this before

* refactors robot_upgrades to work with the new system

- more cleanup
- adds documentation
- fixed a bug I made where you could delete your robot stack via crafting

* moves some unemag logic to the module file, makes more loops typless

* farie review

* fox review

* affected review and more TM bugfixes

* fixes comment

Co-authored-by: SteelSlayer <SteelSlayer@users.noreply.github.com>

code/game/machinery/constructable_frame.dm

@@ -75,11 +75,11 @@
 		if(1)
 			if(istype(P, /obj/item/stack/cable_coil))
 				var/obj/item/stack/cable_coil/C = P
-				if(C.amount >= 5)
+				if(C.get_amount() >= 5)
 					playsound(src.loc, C.usesound, 50, 1)
 					to_chat(user, "<span class='notice'>You start to add cables to the frame.</span>")
 					if(do_after(user, 20 * C.toolspeed, target = src))
-						if(state == 1 && C.amount >= 5 && C.use(5))
+						if(state == 1 && C.get_amount() >= 5 && C.use(5))
 							to_chat(user, "<span class='notice'>You add cables to the frame.</span>")
 							state = 2
 							icon_state = "box_1"
@@ -193,8 +193,8 @@
 						playsound(src.loc, P.usesound, 50, 1)
 						if(istype(P, /obj/item/stack))
 							var/obj/item/stack/S = P
-							var/camt = min(S.amount, req_components[I])
-							var/obj/item/stack/NS = new P.type(src)
+							var/camt = min(S.get_amount(), req_components[I])
+							var/obj/item/stack/NS = new S.merge_type(src)
 							NS.amount = camt
 							NS.update_icon()
 							S.use(camt)