Could someone exlpains me how lua works in 2016 files ?

[fido67]

hello
Could someone exlpains me how lua works in 2016 files ?
I m software dev in real life. So i wont be lost , I just want to know if there is a documentation about fiesta lua or an API to import to my project
how to link the scripts to a thing and can I do it in C++ or Java ?
I have so many idears to do and im alone on my project , so if someone explains me a little this part of server mechanics it will save me many times.
thanks for your reading !

[MentaL]