Adds installing cells as part of mech construction and fixes some mech construction bugs. (#30942)

* spawn_mecha_result() code

Function that places the cell from construction from the holder into the new mech, and check and applies scanning module/capacitor upgrades for combat mechs

* New holder icons

No change made to the new sprites as of current.

* New ripley construction code

* New gygax construction code

* New fireripley construction code

* New honker construction code

* New durand construction code

* New phazon construction code

* New odysseus construction code

* Cyberboss Requested Fixes #1

* Cyberboss Requested Fixes #2

Turns result in mecha_construction_paths to types, also removes result in phazon_chassis as it has no purpose.
changes qdel to QDEL_NULL

* Removes old cell from add_cell() in the Initialize()

* Move CheckParts to obj/mecha and move cell check to CheckParts

code/datums/helper_datums/construction_datum.dm

@@ -62,6 +62,14 @@
 		qdel(holder)
 	return
 
+/datum/construction/proc/spawn_mecha_result()
+	if(result)
+		var/obj/mecha/m = new result(get_turf(holder))
+		var/obj/item/oldcell = locate (/obj/item/stock_parts/cell) in m
+		QDEL_NULL(oldcell)
+		m.CheckParts(holder.contents)
+		QDEL_NULL(holder)
+
 /datum/construction/proc/set_desc(index as num)
 	var/list/step = steps[index]
 	holder.desc = step["desc"]