add ghostty configuration and update flake.lock for new dependencies

config/nixos/packages/workstation/ghostty.nix

@@ -1,5 +1,9 @@
 { ghostty, pkgs, ... }:
 {
+  # Known issue: https://ghostty.org/docs/help/terminfo
+  # Issue output such as: tput: unknown terminal "xterm-ghostty"
+  # Simply run:
+  #   $ infocmp -x | ssh SERVER_TO_FIX -- tic -x -
   environment.systemPackages = [
     ghostty.packages.x86_64-linux.default
   ];