Projected Textures for Starfall

[Advers]

As it currently stands, the only way to use projected textures alongside Starfall is to spawn a gmod or wiremod lamp, but this is very limiting compared to what is possible with direct Lua control over projected textures. These would be a useful and good addition, though they will need new particular permissions and cvars to not be abused since they can significantly affect framerate and cause crashes. I think they could fit into light.lua, but creating a new library for them shouldn't be off the table. Feedback and opinions appreciated

[thegrb93]

light.lua would be the best place.

[Advers]

I've created a fork of my branch to work on this. I will add things as I find the time to do so