The new [SOMEWHAT NEAT] Nanotrasen Outpost! (#2490)

## About The Pull Request
todo:
- [x] make hangars
- [x] make the rock walls indestructible
- [x] expand the bar
- [ ] open up more exterior?

Adds a brand new Nanotrasen-controlled outpost situated on an ice
planet.

Features include:
- A neat little bar.
- Two shops.
- A brig, and a security checkpoint.
- An ERT bay.
- Old maintenance tunnels containing The Horrors. (mothroach x1)
- A nice view.

## Images
<details><summary>The Outpost</summary>


![a91dad31c20289ea25ea2d1f7739ccdc](https://github.com/shiptest-ss13/Shiptest/assets/118859017/54712806-9b9f-45e2-b0ae-b1067759054e)


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/f0632676-2853-46a2-89bf-7a36067b821d)


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/b92f073c-eecb-42ed-94f3-1ec1b3ec60c6)

</details>

<details><summary>Hangars</summary>


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/b34c6e4c-871d-41ad-a250-6df07afbf0f8)
20x20


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/92f4258b-1772-4263-8568-977e6cd53124)
40x20


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/3264bf97-007f-4f7d-9a8b-03f39e465a73)
56x20


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/c2453d74-a7e3-4c41-982d-e3bcea87af55)
40x40


![image](https://github.com/shiptest-ss13/Shiptest/assets/118859017/39a27d66-c01b-4c2d-b03f-10966470f175)
56x40
</details>

## Changelog

🆑
add: A new Nanotrasen outpost, located on an ice planetoid, has been
added.
/🆑

_maps/outpost/elevator_ice.dmm

@@ -0,0 +1,47 @@
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+"a" = (
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+/turf/template_noop,
+/area/template_noop)
+"e" = (
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+/obj/machinery/light/small/directional/east{
+	pixel_y = -6
+	},
+/obj/machinery/elevator_floor_button{
+	pixel_y = 10;
+	dir = 8;
+	pixel_x = 24
+	},
+/turf/template_noop,
+/area/template_noop)
+"A" = (
+/obj/structure/elevator_platform,
+/turf/template_noop,
+/area/template_noop)
+"S" = (
+/obj/structure/elevator_platform,
+/obj/machinery/status_display/elevator{
+	pixel_x = 32
+	},
+/turf/template_noop,
+/area/template_noop)
+
+(1,1,1) = {"
+A
+A
+A
+"}
+(2,1,1) = {"
+A
+A
+A
+"}
+(3,1,1) = {"
+a
+S
+e
+"}