feat: `logger.progress` to allow customising suffix

[Alejandro Santiago]

Description

Currently all logger.progress options will suffix .... This might not always be desired by the user.

See:

mason/packages/mason_logger/lib/src/progress.dart

Line 61 in 030ff3c

 _write('$prefix$_message...'); 

Proposed changes

To add a new member suffixFrames or suffix to ProgressAnimation to customise the suffix.

Additional context

I'm willing to contribute to this change as soon as we agree on a proposed solution.