move helix as home module, provide option youthlic.programs.helix.

home/modules/helix/default.nix

@@ -0,0 +1,56 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+{
+  options = {
+    youthlic.programs.helix = {
+      enable = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        example = false;
+        description = ''
+          enable helix editor
+        '';
+      };
+      extraPackages = lib.mkOption {
+        type = lib.types.listOf lib.types.package;
+        default = with pkgs; [
+          taplo
+          markdown-oxide
+          nixd
+          deno
+          nixfmt-rfc-style
+        ];
+        example = (
+          with pkgs;
+          [
+            deno
+          ]
+        );
+        description = ''
+          extra packages for helix lsp and formatter
+        '';
+      };
+    };
+  };
+  config =
+    let
+      cfg = config.youthlic.programs.helix;
+    in
+    {
+      programs.helix = lib.mkIf cfg.enable {
+        enable = true;
+        defaultEditor = true;
+        settings =
+          let
+            config-file = builtins.readFile ./config.toml;
+            config = builtins.fromTOML config-file;
+          in
+          config;
+      };
+      home.packages = cfg.extraPackages;
+    };
+}