Luau Support

**Is your feature request related to a problem? Please describe.**
I'm working on a game that will require the ability to sandbox the engine. However, only luajit is supported, and having an ability to use other lua versions would be very helpful.

**Describe the solution you'd like**
Add more features to adjust lua for yourself, like changing the lua version.

**Describe alternatives you've considered**
None really, just luau support.

The issue names no files, tests, or entry points. Start by locating the existing LuaJIT integration in the Rust plugin and determine how alternate Lua versions are configured; done means the project supports Luau with a documented configuration path and coverage for the supported behavior.

Written by the indexing model from the issue text.