adds hydrogen, ice, and combustion thrusters! (#2431)

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request process. -->

## About The Pull Request
adds the following:

Hydrogen gas, gotten using hydrogen merits at designated fuel pumps
Merits, gotten from putting ice in the electrolyzer or from the Hydrogen
Exchange
Hydrogen Exchange, a machine that switches between credits and merits,
for a price.

Combustion Thrusters, which take a fuel and oxidizer mix and creates
thrust. Bad ratios waste fuel. Heaters above 1010kpa take damage and
eventually leak and explode.

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documented or this can delay review and even discourage maintainers from
merging your PR! -->

## Why It's Good For The Game
adding hydrogen allows for a fuel loop to be created, and combustion
thrusters add depth that plasma thrusters just don't have.

Current Oxidizers + multipliers
Oxygen 1x
Nitryl 1x
N2O 3x + cools heater gases

Current Fuels + multipliers
Hydrogen 0.5x
Plasma 1x
Tritium 3x


https://cdn.discordapp.com/attachments/837744059291533395/1167252813974356038/2023-10-26_19-00-05.mp4?ex=654d73e5&is=653afee5&hm=b83a3d48f62a76eed47965c86baa93f906db9defcad7d55293c1eb1c2e6f623b&
link to video

Big thanks to Bog Creature! I wouldn't have gotten nearly this far
without their help.

overpressure demo:
https://youtu.be/kHi6YwixPHs
hydrogen system demo:
https://youtu.be/uSetVeQDrtI?si=4AN-PotFAONM9aLI


![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/65dcc95c-eca5-485a-981c-b72e66301a65)
ore in asteroid

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/9a03b0fe-9520-4679-8202-c80d6c667f54)
ice ore

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/30eacab2-8f0d-4263-bfaf-e378ea0643fe)
cans!
<!-- Please add a short description of why you think these changes would
benefit the game. If you can't justify it in words, it might not be
worth adding. -->
new hydrogen machines, though merits and the hydrogen pump should get
better sprites before merge

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/0339827c-c756-49c0-b7dc-e00e8418aeee)
orange screen to match UI

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/9c4b1ae8-5c17-4d8f-9d67-0fde00e34508)

changed ships

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/24242b38-92d3-4f6f-b4da-36f346513290)

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/bbe8be05-be2f-49ab-b346-afa395569b62)

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/a2957267-396e-48ee-91c5-856906c1a9e3)

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/06c3e0bf-e36c-431a-9baf-585069bf8f4c)

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/1e9110b0-a365-4234-82aa-7b60aa31cb69)

![image](https://github.com/shiptest-ss13/Shiptest/assets/90987989/4f269819-8f87-4300-94f8-c383675a7a70)

## Changelog
:cl:
add: Added Hydrogen, and Combustion Thrusters to go with!
/:cl:

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your name to the right of the first :cl: if you want to overwrite your
GitHub username as author ingame. -->
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the changes rather than a summary of the PR's contents. -->

---------

Signed-off-by: HelmCrab <[email protected]>
Co-authored-by: Mark Suckerberg <[email protected]>
Co-authored-by: JimKil3 <[email protected]>
Co-authored-by: goober3 <[email protected]>
Co-authored-by: FalloutFalcon <[email protected]>

_maps/outpost/indie_space.dmm

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+/obj/machinery/computer/electrolyzer_console{
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@@ -728,11 +727,10 @@
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-/obj/machinery/mineral/processing_unit{
-	input_dir = 8;
-	output_dir = 1
+/obj/machinery/conveyor/inverted{
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@@ -2541,6 +2539,13 @@
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+"rk" = (
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@@ -5032,10 +5037,8 @@
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_maps/outpost/nanotrasen_ice.dmm

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@@ -2851,10 +2851,9 @@
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+/obj/machinery/computer/electrolyzer_console{
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@@ -2958,8 +2957,8 @@
 	},
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_maps/shuttles/independent/independent_dwayne.dmm

@@ -138,11 +138,10 @@
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-	dir = 8;
-	name = "engine fuel pump"
-	},
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@@ -287,7 +286,7 @@
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@@ -346,26 +345,27 @@
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@@ -477,9 +477,10 @@
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