Add Support for Luajit

[GPeaky]

Hi, i have seen that Fivem have support for lua 5.3 and 5.4, the majority of the scripts of fivem are doned with lua. And some servers lacks performance, so why don't implement Luajit that is much faster than lua5.4?

This is just an example code:

local t = {}

for i = 1, 1000000 do
    t[i] = i
end

local sum = 0
for i = 1, 1000000 do
    sum = sum + t[i]
end

print(sum)

Lua54 Result:

500000500000
Elapsed: 15.4517ms

LuaJit Result:

500000500000
Elapsed: 3.4772ms

This test don't show the real case difference but its a showcase to see the performance difference between the two options. And i think if this is implement most of the servers and clients will notice it.