bunch of vscode changes + add luau-lsp package

packages/luau-lsp.nix

@@ -0,0 +1,41 @@
+{ pkgs, lib, ...
+}:
+pkgs.stdenv.mkDerivation (finalAttrs: {
+  pname = "luau-lsp";
+  version = "1.38.0";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "JohnnyMorganz";
+    repo = "luau-lsp";
+    rev = finalAttrs.version;
+    hash = "sha256-31EdtCQftxhpp2b7fpM5XqRh+r0rBE/k9SpYEPpGpV0=";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = [ pkgs.cmake ]
+    ++ lib.optional pkgs.stdenv.isLinux pkgs.gcc9;
+
+  buildPhase = ''
+    runHook preBuild
+    cmake ..
+    cmake --build . --target Luau.LanguageServer.CLI --config Release
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/bin
+    cp ./luau-lsp $out/bin/luau-lsp
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Language Server for Luau";
+    homepage = "https://github.com/JohnnyMorganz/luau-lsp";
+    downloadPage = "https://github.com/JohnnyMorganz/luau-lsp/releases/tag/${finalAttrs.version}";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux;
+    maintainers = with lib.maintainers; [ cswimr ];
+    mainProgram = "luau-lsp";
+  };
+})