Require wrapper for the icu::TimeZoneNames class in PyICU

Dear PyICU Developers/Maintainers,

I am writing to request a wrapper for the icu::TimeZoneNames class in PyICU. This class provides methods for getting the metazone ID and display name for a given time zone. Currently, PyICU does not provide any wrapper for this class, so we are unable to use it in our Python code.

We have a number of IANA time zone IDs that we need to extract the metazones for. For example, we need to extract the metazone "America_Central" for the time zone ID "America/Chicago" and the metazone "India" for the time zone ID "Asia/Calcutta".

We would be grateful if you could add a wrapper for the icu::TimeZoneNames class in PyICU. This would be a great help to us and to other Python developers who need to use this class.

Thank you for your time and consideration.

@vajda Please take a look at this request.