[FEATURE] Add regex-based filtering support in PPL queries

Is your feature request related to a problem?

Currently, PPL supports the LIKE expression, which works with wildcards. However, it does not natively support filtering using regular expressions, a feature many users need for more advanced and flexible text matching.

What solution would you like?

Introduce regular expression matching capability either by enhancing the LIKE operator or introducing a new operator, similar to the functionality described in https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/CWL_QuerySyntax-Filter.html#CWL_QuerySyntax-regex.

What alternatives have you considered?

As a workaround, users can use the parse command to match the entire line and filter out non-empty results for a newly created field. However, this approach is complex and requires additional validation to ensure it behaves as expected.

Do you have any additional context?

N/A

Start by reading the existing PPL LIKE expression and parse command behavior, then compare the requested matching semantics with the linked CloudWatch regex documentation. Done means an agreed operator design, defined regular-expression behavior, and validation that the new filtering capability behaves as expected.