Add CSharp language and refine Nix LSP settings

- Define CSharp language with format_on_save, tab_size, and servers
- Expand Nix language configuration with formatter and tab settings
- Simplify nixd LSP config by removing redundant initialization options

modules/core/packages/appimages/helium.nix

@@ -37,3 +37,4 @@ in
     };
   }
 # https://github.com/imputnet/helium-linux/releases/download/0.11.7.1/helium-0.11.7.1-x86_64.AppImage
+

modules/home/zed/user-settings/languages.nix

@@ -1,9 +1,17 @@
 _: {
   programs.zed-editor.userSettings.languages = {
-    Nix.language_servers = [
+    Nix = {
+      format_on_save = "on";
+      tab_size = 2;
+      language_servers = [
         "nixd"
         "!nil"
       ];
+      formatter.external = {
+        command = "alejandra";
+        arguments = ["--quiet" "--"];
+      };
+    };
     Python = {
       format_on_save = "off";
       formatter.language_server.name = "ruff";
@@ -85,5 +93,10 @@ _: {
       format_on_save = "on";
       tab_size = 2;
     };
+    CSharp = {
+      format_on_save = "on";
+      tab_size = 2;
+      language_servers = ["!csharp-ls" "!roslyn" "omnisharp"];
+    };
   };
 }

modules/home/zed/user-settings/lsp.nix

@@ -123,13 +123,7 @@
         };
       };
     };
-    nixd = {
+    nixd.settings = {
-      initialization_options.formatting.command = [
-        "alejandra"
-        "--quiet"
-        "--"
-      ];
-      settings = {
       nixpkgs.expr = "import <nixpkgs> { }";
       formatting.command = ["alejandra"];
       options = {
@@ -137,7 +131,6 @@
         home-manager.expr = "(builtins.getFlake (builtins.toString \"/home/${username}/garandos\")).nixosConfigurations.\"${host}\".options.home-manager.users.type.getSubOptions []";
       };
     };
-    };
     ruff = {
       binary = {
         path = lib.getExe pkgs.bash;