Add documentation/lua-docs #104
Description
Add documentation for:
- tp-tube (modding-api and ingame-api)
- tag-tube (Tags support #107)
- embedded tube registration (modding-api)
- lua-tube events and interface (ingame)
- detector tubes (ingame)
- digiline injector (ingame)
(maybe in a api.md or in the repo readme itself)