Machinist workshop remap (#22898)

Remaps the machinist workshop to fulfil a few criteria missing from
https://github.com/Aurorastation/Aurora.3/pull/22718. Particularly aims
to make the workshop more functional for IPC medical gameplay.

- The surgical theatre has been expanded so two machinists can more
practically work in the same space at the same time. In the existing
design, this portion of the workshop is far too claustrophobic. It also
has a desk.
- The exosuit chargers no longer obstruct access from the garage door.
- Resolved a lot of awkward uses of decals and platforms, which should
also make for more useable space.
- Cleaned up the wiring - both rooms are now wired to the civilian
subgrid. Previously, the main workshop area was hooked via a very
awkward line to the operations subgrid, while the theatre was wired to
civilian.
- Shifted a lot of the clutter into the robotics vendor, such as the
empty first-aid kits for medbots.
- Shifted materials crates + the crate shelf to a central position, to
make them easier to track.

Things of note for maintainers:

- It's never ideal to remap something very soon after the original
implementation, but having given this remap a full month, I think it's
had a fair chance. Having played machinist in it, the layout is very
tough to work in. It's a very cluttered environment, which becomes much
harder to look at once there's a disassembled mech cluttering the centre
with a dozen or so objects. This aims to be more intuitive to play in
and less overwhelming for players.
- The surgical theatre contains one additional IV drip, one extra O-
bag, and one organ cooler for borgings, and there are now two roller
beds accessible by the front desk. I'd rather have a more unique
solution for this problem long-term, but in the short-term it very much
sucks to have to ask to borrow a roller from medical just so you can
move a damaged industrial, given you can no longer pick that industrial
up unless you're playing a huge species.
- Otherwise, the workshop has the same resources as before and will be
able to make the same things.

(screenshot taken after testing, and prior to further changes)
<img width="1081" height="1080" alt="image"
src="https://github.com/user-attachments/assets/a8eef0e3-630b-463d-b3c3-22769001b513"
/>
<img width="480" height="448" alt="image"
src="https://github.com/user-attachments/assets/535dc851-7bab-48f7-a916-a5a1f12bf650"
/>

code/modules/reagents/reagent_containers/spray.dm

@@ -134,6 +134,11 @@
 	name = "space cleaner"
 	desc = "BLAM!-brand non-foaming space cleaner!"
 
+/obj/item/reagent_containers/spray/cleaner/surgical
+	name = "surgical cleaner"
+	desc = "Someone has crossed out the Space from Space Cleaner and written in Surgery. 'Do not remove under punishment of death!!!' is scrawled on the back."
+	icon_state = "sterilespray"
+
 /obj/item/reagent_containers/spray/cleaner/drone
 	name = "space cleaner"
 	desc = "BLAM!-brand non-foaming space cleaner!"