Add a construction to convert street lights to use local power

[chaosvolt]

Summary

SUMMARY: Content "Add a construction entry for converting street lights to use local grid power as a lighting option"

Purpose of change

This adds what was going to be the highlight (heh) of #3265 before the sheer number of locations to give street lights to quickly became two PRs (one still yet to be written) worth of work alone.

Describe the solution

1. Added furniture for rewired street lights, when turned on provide twice the light of floor lamps and draw power twice as fast.
2. Added construction and construction group for rewiring a street light. Idea is making use of existing cables to connect to whatever infrastructure the survivor has jury-rigged to power their base with, should they choose a location that already has a street light already handy. Includes amplifiers to adjust for different voltage and a small amount of added wiring.
3. Added sprites for rewired lamp to UDP external tileset.
4. Updated documentation of external tileset accordingly.

As I found out, for some reason it doesn't work right if it inherits from normal street lights, but making it inherit from f_floor_lamp_base while overriding basically all the properties the abstract defines which should thus be the same net effect? That's fine somehow, fucking weird.

My guess is because street lights are in furniture-terrains.json and might thus count as a later file in the load order, a rare case of load order being more fiddly than normal.

Describe alternatives you've considered

1. Messing with the skill requirement of rewiring to be more involved in some way.
2. Just letting you build you own big-ass light towers.

Testing

1. Load-tested in compiled build.
2. Spawned in a street light at an evac shelter and converted it.
3. Tested turning it on and off, works as expected.

Additional context

Lamp off, daytime:

Lamp on, nighttime:

[scarf005]

2023-09-27_13-20-47.mp4

nice. wish it would auto turn on/off when it's night/day, but that's probably very Lua