armbian-next: countdown: split off file for countdown functions (countdown-to-abort and countdown-to-continue)

- introduce `countdown.sh`, move `traps.sh::exit_if_countdown_not_aborted()` there, introduce `exit_if_countdown_not_aborted()`

lib/functions/logging/traps.sh

@@ -186,36 +186,3 @@ function exit_with_error() {
 	exit 43
 }
 
-# This exits, unless user presses ENTER. If not interactive, user will be unable to comply and the script will exit.
-function exit_if_countdown_not_aborted() {
-	# parse
-	declare -i loops="${1}"
-	declare reason="${2}"
-	# validate
-	[[ -z "${loops}" ]] && exit_with_error "countdown_to_exit_or_just_exit_if_noninteractive() called without a number of loops"
-	[[ -z "${reason}" ]] && exit_with_error "countdown_to_exit_or_just_exit_if_noninteractive() called without a reason"
-
-	# If not interactive, just exit.
-	if [[ ! -t 1 ]]; then
-		exit_with_error "Exiting due to '${reason}' - not interactive, exiting immediately."
-	fi
-
-	display_alert "Problem detected" "${reason}" "err"
-	display_alert "Exiting in ${loops} seconds" "Press <Ctrl-C> to abort, <Enter> to ignore and continue" "err"
-	echo -n "Counting down: "
-	for i in $(seq 1 "${loops}"); do
-		declare stop_waiting=0
-		declare keep_waiting=0
-		timeout --foreground 1 bash -c "read -n1; echo \$REPLY" && stop_waiting=1 || keep_waiting=1
-		if [[ "$stop_waiting" == "1" ]]; then
-			display_alert "User pressed ENTER, continuing, albeit" "${reason}" "wrn"
-			return 0
-		fi
-		echo -n "$((10 - i))... " >&2
-	done
-
-	echo "" >&2 # No newlines during countdown, so break one here
-
-	# Countdown finished, exit.
-	exit_with_error "Exiting due to '${reason}'"
-}