Extract lua language support into an extension (#10437)

Release Notes:

- Extracted lua language support into an extension, and improved Lua
highlighting and completion label styling.

---------

Co-authored-by: Marshall <marshall@zed.dev>

crates/languages/src/lib.rs

@@ -18,7 +18,6 @@ mod deno;
 mod elixir;
 mod go;
 mod json;
-mod lua;
 mod nu;
 mod ocaml;
 mod python;
@@ -69,7 +68,6 @@ pub fn init(
         ("heex", tree_sitter_heex::language()),
         ("jsdoc", tree_sitter_jsdoc::language()),
         ("json", tree_sitter_json::language()),
-        ("lua", tree_sitter_lua::language()),
         ("markdown", tree_sitter_markdown::language()),
         ("nix", tree_sitter_nix::language()),
         ("nu", tree_sitter_nu::language()),
@@ -280,7 +278,6 @@ pub fn init(
     language!("scheme");
     language!("racket");
     language!("regex");
-    language!("lua", vec![Arc::new(lua::LuaLspAdapter)]);
     language!(
         "yaml",
         vec![Arc::new(yaml::YamlLspAdapter::new(node_runtime.clone()))]