Enable metals semantic highlighting

home/kakoune/kak.nix

@@ -60,6 +60,11 @@ in
     command = "metals";
     filetypes = [ "scala" ];
     roots = [ "build.sbt" ];
+    settings_section = "metals";
+    settings.metals = {
+      enableSemanticHighlighting = true;
+      showInferredType = true;
+    };
   };
   programs.kak-lsp.languages.latex = {
     command = "texlab";

home/modules/programs/my-kakoune/kak-lsp.nix

@@ -177,6 +177,7 @@ let
         { face = "class"; token = "struct"; }
         { face = "class"; token = "trait"; }
         { face = "class"; token = "union"; }
+        { face = "class"; token = "class"; }
 
         ## Comments
         { face = "documentation"; token = "comment"; modifiers = [ "documentation" ]; }