list available pipelines on PyGrid

[Alan Aboudib]

Feature Description

We should be able to get a list of pipelines deployed on PyGrid.

The call could be syfertext.list(name_regex = '<regex>')

The result could be a list of dictionaries each describing one pipeline. Such a dictionary could have keys such as 'name', 'pipe_names', 'description', 'tags', 'version', 'timestamp'.

The name_regex argument should be used to list only pipe lines whose names match the regex.

Additional Context

merge to branch syfertext_0.1.0