Build, test, and debug regular expressions
Matches 12-hour style times with optional AM/PM markers, such as '9:30', '09:45am', '11 pm', or '3p'. The pattern captures the hour, minutes, and meridiem indicator into separate groups, making it useful for extracting or parsing times from text like schedules, logs, or chat messages. Note that it requires two-digit minutes (00-59) and the hour pattern [0-2]?[1-9] excludes values like 10 and 20, so times such as '10:30' won't match.