refactor: move ripgrep extra package to telescope plugin definition

plugins/telescope.nix

@@ -1,6 +1,6 @@
 # homepage: https://github.com/nvim-telescope/telescope.nvim
 # nixvim doc: https://nix-community.github.io/nixvim/plugins/telescope/index.html
-{ libn, ... }:
+{ libn, pkgs, ... }:
 
 {
   opts = {
@@ -8,6 +8,9 @@
   };
 
   rootOpts = {
+    # Needed for live grep
+    extraPackages = [ pkgs.ripgrep ];
+
     # Enable catppuccin colors
     # https://github.com/catppuccin/nvim/blob/main/lua/catppuccin/groups/integrations/telescope.lua
     colorschemes.catppuccin.settings.integrations.telescope.enabled = true;