Add LuaFormatter

[Camouflager]

Formatter tool
LuaFormatter
https://github.com/Koihik/LuaFormatter

Filetype(s)
lua

Additional context
luaformatterfiveone is unmaintained and outdated. It would be nice to add LuaFormatter

[mxngls]

Please see my comment here. If you follow these steps formatting lua files via vim-codefmt works as expected. Please note that for the formatter to work lua version 5.1 has to be (separately) installed.