Build, test, and debug regular expressions
Matches dates in DD.MM.YY format, optionally preceded by a numbered list marker like '12) ' (two digits, closing parenthesis, space). The day part can be a single two-digit day or a range such as '12-15', followed by .MM.YY with each segment captured separately. Designed for reordering captures in a replacement to convert European DD.MM.YY dates into ISO-style YYYY.MM.DD. Global and multiline flags ensure every date on every line is processed.