refactor: cleanup nixvim config

modules/home-manager/nixvim.nix

@@ -2,10 +2,11 @@
 
 {
   programs.nixvim = {
-    globals.mapleader = " ";
     enable = true;
+
     viAlias = false;
     vimAlias = true;
+
     opts = {
       number = true;
       relativenumber = true;
@@ -14,14 +15,30 @@
       expandtab = true;
       incsearch = true;
     };
+
     colorschemes.nord.enable = true;
+    globals.mapleader = " ";
+
     plugins.lualine.enable = true;
     plugins.nix.enable = true;
     plugins.nvim-tree.enable = true;
-    plugins.treesitter.enable = true;
+    plugins.treesitter = {
+      enable = true;
+      settings.ensure_installed = [ "markdown" "markdown_inline" ];
+    };
     plugins.telescope.enable = true;
     plugins.web-devicons.enable = true;
     plugins.indent-blankline.enable = true;
-    extraPlugins = [ pkgs.vimPlugins.plenary-nvim ];
+    plugins.render-markdown = {
+      enable = true;
+      settings = {
+        # render in normal mode, raw source in insert
+        render_modes = [ "n" "c" "t"];
+        pipe_table.preset = "round";
+        heading.width = "block";
+        file_types = [ "markdown" ];
+        completions.lsp.enabled = true;
+      };
+    };
   };
 }