Change g:format to accept date, datetime and time

### Issue description

Change g:format to take date, datetime and time, instead of single date format

Start by locating the g:format implementation and its existing tests in the Grails codebase. Read how the current single date format is handled, then identify the tests needed to cover date, datetime, and time inputs. Done means the requested input types are supported and the relevant tests pass.

Written by the indexing model from the issue text.