LSP: Add tree-sitter to emacs package

flake.nix

@@ -8,6 +8,10 @@
     mkEmacs = pkgs: v: pkgs.emacsWithPackagesFromUsePackage {
       config = ./main.org;
       package = pkgs."${v}${if pkgs.stdenv.isDarwin then "-macport" else "-pgtk"}";
+      extraEmacsPackages = epkgs: with epkgs; [
+        vterm
+        treesit-grammars.with-all-grammars
+      ];
     };    
   in (flake-utils.lib.eachDefaultSystem (system: let
       pkgs = import nixpkgs {