refactor: migrate nix-darwin config to a flake-parts dendritic layout

modules/aspects/_editor/nvf/lsp/languages/markdown.nix

@@ -0,0 +1,30 @@
+{
+  # markdown
+  enable = true;
+  extensions = {
+    render-markdown-nvim = {
+      enable = true;
+      setupOpts = {
+        checkbox = {
+          checked.scope_highlight = "@markup.strikethrough";
+        };
+      };
+    };
+  };
+  extraDiagnostics = {
+    enable = true;
+    types = ["markdownlint-cli2"];
+  };
+  format = {
+    enable = true;
+    type = [
+      "prettierd"
+      "deno_fmt"
+    ];
+  };
+  lsp = {
+    enable = true;
+    servers = ["marksman"];
+  };
+  treesitter.enable = true;
+}