Added Light to tree

[phoenixwings99]

I'm making a Light Kineticist (https://metzo.miraheze.org/wiki/Light_(Photokinesis)) and being in the Tree would make it way easier for me to not reinvent the wheel while using the existing work from you and Kineticist Elements Expanded.

[Truinto]

Hey, cool.

I don't have much time these days. I am happy to merge sensible pull requests, but it will take a bit of time for me to push a release.

And there is an open issue with including CodexLib.dll in mods. I did want to make it so if any mod loads it, it always gets the latest of any shipped (searching all mods and loading only the latest once). That did work as intended until last year or so. I could not figure out why. I tried a workaround of replacing old files and forcing a restart. But you cannot write a loaded file and the code must be loaded to run... sooo, bad luck.
Currently the only working solution is to manually ensure all the CodexLib.dll are the same version. That wasn't a huge issue, since the two mods using it don't get much updates (or none at all). Just saying so you don't run into this issue.

Back on topic. You commit use upper case GUIDs. That's unusual. Probably makes no difference, just noticing. The Activatables do not have a generic type. That will not compile. Make sure you use an IDE.