feat: helix updates

modules/capabilities/helix.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ inputs, ... }:
 {
   flake.modules.homeManager.helix =
     { pkgs, ... }:
@@ -31,14 +31,51 @@
     {
       programs.helix = {
         enable = true;
+        package = inputs.helix.packages.${pkgs.stdenv.hostPlatform.system}.default;
         extraPackages = with pkgs; [
           svelteLanguageServer
           nixd
           nixfmt
           oxfmt
+
+          simple-completion-language-server
+
+          rust-analyzer
         ];
 
+        settings = {
+          theme = "kanagawa";
+          editor = {
+            lsp = {
+              auto-document-highlight = true;
+              display-inlay-hints = true;
+            };
+            rainbow-brackets = true;
+            line-number = "relative";
+            cursorline = true;
+            gutters = [
+              "code-action-hint"
+              "diagnostics"
+              "spacer"
+              "line-numbers"
+              "spacer"
+              "diff"
+            ];
+            color-modes = true;
+            cursor-shape = {
+              insert = "bar";
+              normal = "block";
+              select = "underline";
+            };
+          };
+        };
+
         languages = {
+          language-server.scls = {
+            command = "simple-completion-language-server";
+            environment.SNIPPETS_PATH = "${pkgs.vimPlugins.friendly-snippets}/snippets";
+          };
+
           language = [
             {
               name = "svelte";
@@ -47,24 +84,21 @@
                 args = [ "--stdin-filepath=%{buffer_name}" ];
               };
               auto-format = true;
+              language-servers = [
+                "scls"
+                "svelteserver"
+              ];
             }
             {
               name = "nix";
               auto-format = true;
             }
+            {
+              name = "rust";
+              auto-format = true;
+            }
           ];
         };
-
-        settings = {
-          theme = "kanagawa";
-          editor = {
-            cursor-shape = {
-              insert = "bar";
-              normal = "block";
-              select = "underline";
-            };
-          };
-        };
       };
     };
 }