Improve cd function to run like ls -artlh but truncated

modules/home-manager/bash.nix

@@ -61,8 +61,20 @@
       }
 
       cd () {
-          : 'Run cd and if it succeeds, run ls'
-          builtin cd "''$@" && command ls --color -Ah
+          : 'Run cd; on success in a terminal, show the 4 newest entries (with a count of hidden ones)'
+
+          builtin cd "''$@" || return
+          [[ -t 1 ]] || return 0
+          command -v ls &>/dev/null || return 0
+
+          local -a lines
+          mapfile -t lines < <(command ls --color=always --quoting-style=shell-escape -lArth)
+          if (( ''${#lines[@]} > 5 )); then
+              printf '\033[7m... %d more entries ...\033[27m\n' "$(( ''${#lines[@]} - 5 ))";
+              printf '%s\n' "''${lines[@]: -4}"
+          else
+              printf '%s\n' "''${lines[@]}"
+          fi
       }
 
       drop_caches () {