nix: refactor neovim presets into modules

nix/homeModules/extra/neovim-moreLangServers.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+{
+  programs.neovim.extraPackages = [
+    # lua
+    pkgs.lua-language-server
+    pkgs.stylua
+
+    pkgs.nil # nix
+    pkgs.yaml-language-server # yaml
+
+    pkgs.nodePackages.pyright # python
+
+    pkgs.marksman # markdown
+    pkgs.taplo # toml
+    pkgs.lemminx # xml
+    # pkgs.texlab # latex
+  ];
+}