modules/luasnip: add settings

modules/plugins/snippet/luasnip.nix

@@ -8,11 +8,17 @@ in
     enable = mkEnableOption "luasnip";
 
     package = mkPackageOption pkgs.vimPlugins "luasnip" { };
+
+    settings = mkOption {
+      type = types.attrs;
+      default = { };
+    };
   };
 
   config = lib.mkIf cfg.enable {
     plugin.luasnip = {
       inherit (cfg) package;
+      setupSettings = cfg.settings;
     };
   };
 }