lua builtin modules ported from https://github.com/EmmyLua/IntelliJ-EmmyLua/tree/master/src/main/resources/std, to make EmmyLua-LanguageServer work for lua builtin modules

use in EmmyLua-LanguageServer

call coc#config('languageserver.EmmyLua', {
        \   'command': &shell,
        \   'args': [&shellcmdflag, 'java -cp EmmyLua-LS-all.jar com.tang.vscode.MainKt'],
        \   'filetypes': ['lua'],
        \   'initializationOptions': {
        \     'stdFolder': 'file:///path_to_this_repo/std/Lua54',
        \   },
        \ })

note the file:// is required to make the stdFolder work, see also, samples:

• file:///abs_path
• file://../rel_path
• file://C:\Windows_path