feat: helix updates

modules/capabilities/helix.nix

@@ -53,15 +53,16 @@
           simple-completion-language-server
 
           rust-analyzer
+          cargo
         ];
 
         settings = {
-          theme = "kanagawa";
+          theme = "kanagawa-custom";
           editor = {
             soft-wrap.enable = true;
             lsp = {
               auto-document-highlight = true;
-              display-inlay-hints = true;
+              display-inlay-hints = false;
             };
             rainbow-brackets = true;
             line-number = "relative";
@@ -83,6 +84,14 @@
           };
         };
 
+        themes.kanagawa-custom = {
+          inherits = "kanagawa";
+          "ui.highlight".underline = {
+            color = "dragonBlue";
+            style = "line";
+          };
+        };
+
         languages = {
           language-server.scls = {
             command = "simple-completion-language-server";