[Experimental] Rust-based LuaLs

[CppCXY]

This version switches the host part of luals entirely to a Rust implementation. The related build tool directly uses Cargo. It is not fully completed yet; it can run on the Windows platform for now. I do not have the equipment to test it on other platforms.

I created this repo as a way to learn Rust and did not intend to replace the original luals. It simply provides another possibility for multi-platform compilation.

link: https://github.com/LuaLS/lua-language-server-rust