Consider renaming luau to roblox

[xhayper]

Luau have been made open source for a while now, and can be used outside of roblox.

In monkeytype, the luau we have is actually luau with roblox function in it, which can cause confusion because roblox luau have a tons of function that doesn't exist in vanilla luau.

The following word doesn't exist in vanilla luau.

debuggermanager
pluginmanager
printidentity
elapsedTime
usersettings
settings
version
stats
spawn
tick
task
time
delay
wait