adds 'exterior' lights

[warriorstar-orion]

What Does This PR Do

This PR adds "exterior" lights, which draw power from the powernet of the wall that they're mounted on, rather than the powernet of the tile that they're on. They're not buildable in-game yet, just available for mappers. It also replaces the lights on the outside of the snow biodome and casino with them as example usage.

Why It's Good For The Game

Useful for locations where you don't want to extend areas/powernets outside of a confined space, such as buildings, since areas convey much more behavior than powernets such as safety from weather, atmos, etc.

Images of changes

## Testing See above. ## Declaration - [X] I confirm that I either do not require [pre-approval](https://github.com/ParadiseSS13/Paradise/blob/master/docs/CODE_OF_CONDUCT.md#types-of-changes-that-need-approval) for this PR, or I have obtained such approval and have included a screenshot to demonstrate this below.

Changelog

🆑
tweak: Some lights on the exterior of locations, such as the snow biodome and casino, draw power from the location's powernet.
/:cl:

[github-actions]

This pull request seems to be stale as there have been no changes in 14 days, please make changes within 7 days or the PR will be closed. If you believe this is a mistake, please inform a development team member on Discord.

[PollardTheDragon]

Lgtm