big changes to neovim, might streamline later, also some term environment settings

home/modules/devtools/neovim/plugins/markdown-preview.nix

@@ -1,20 +1,34 @@
+{ lib
+, config
+, ...
+}:
+let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.modules.devtools.neovim.plugins.markdown-preview;
+in
 {
-  programs.nixvim = {
-    plugins.markdown-preview = {
-      enable = true;
+  options = {
+    modules.devtools.neovim.plugins.markdown-preview.enable = mkEnableOption "Enables Markdown Preview plugin for Neovim";
+  };
 
-      settings = {
-        auto_close = false;
-        theme = "dark";
+  config = mkIf cfg.enable {
+    programs.nixvim = {
+      plugins.markdown-preview = {
+        enable = true;
+
+        settings = {
+          auto_close = false;
+          theme = "dark";
+        };
       };
-    };
 
-    files."after/ftplugin/markdown.lua".keymaps = [
-      {
-        mode = "n";
-        key = "<leader>m";
-        action = ":MarkdownPreview<cr>";
-      }
-    ];
+      files."after/ftplugin/markdown.lua".keymaps = [
+        {
+          mode = "n";
+          key = "<leader>m";
+          action = ":MarkdownPreview<cr>";
+        }
+      ];
+    };
   };
 }