feat(common): add new timer function to ZSH

collections/ansible_collections/nullified/infrastructure/roles/common/templates/home/.zsh_functions

@@ -19,3 +19,26 @@ function kubeshell() {
   kubeBinary=$(command -v kubectl)
   "${kubeBinary}" exec -i -t -n "${namespace}" "${pod}" -c "${container}" "${@}" -- sh -c "clear; (zsh || bash || ash || sh)"
 }
+
+function timer() {
+  if [ $# != 1 ]; then
+    printf "Missing duration in \`sleep\` format (e.g. 2m)\n"
+    return 1
+  fi
+  read -r < <(sleep "$1" & echo $!)
+  local sleep_pid="${REPLY}"
+  trap 'kill "${sleep_pid}" ; return 0' SIGINT SIGTERM SIGQUIT
+
+  while :
+  do
+    if ! output_cmd=$(ps -o etime= -o args= -p "${sleep_pid}"); then
+      echo -ne "Buzz!\033[0K\r\n"
+      repeat "${TIMER_SOUND_REPEAT_COUNT:-3}" aplay "${TIMER_SOUND_FILE:-${HOME}/Music/Sounds/timer_done.wav}" &> /dev/null
+      return 0
+    else
+      echo -ne "${output_cmd}\033[0K\r" | sed -E 's/\s+([0-9:]+)\s+sleep\s+(.+)/Elapsed: \1 of \2/'
+      sleep "${TIMER_NOTIF_STEP:-1}"
+    fi
+  done
+  return 1
+}