feat(editors): Add initial helix config

hosts/framework/default.nix

@@ -40,6 +40,7 @@
       default = "nvim";
       # code.enable = true;
       emacs.enable = true;
+      helix.enable = true;
       vim.enable = true;
     };
 

modules/editors/helix.nix

@@ -0,0 +1,47 @@
+{
+  config,
+  options,
+  lib,
+  pkgs,
+  ...
+}:
+with lib;
+with lib.my; let
+  cfg = config.modules.editors.helix;
+in {
+  options.modules.editors.helix = {enable = mkBoolOpt false;};
+
+  config = mkIf cfg.enable {
+    home-manager.users.emiller.programs.helix = {
+      enable = true;
+      extraPackages = [pkgs.marksman];
+      languages = {
+        # the language-server option currently requires helix from the master branch at https://github.com/helix-editor/helix/
+        language-server.typescript-language-server = with pkgs.nodePackages; {
+          command = "${typescript-language-server}/bin/typescript-language-server";
+          args = ["--stdio" "--tsserver-path=${typescript}/lib/node_modules/typescript/lib"];
+        };
+
+        language = [
+          {
+            name = "rust";
+            auto-format = false;
+          }
+        ];
+      };
+      settings = {
+        # theme = "STYLIX";
+        editor = {
+          line-number = "relative";
+          lsp.display-messages = true;
+        };
+        keys.normal = {
+          space.space = "file_picker";
+          space.w = ":w";
+          space.q = ":q";
+          esc = ["collapse_selection" "keep_primary_selection"];
+        };
+      };
+    };
+  };
+}