Expand --cloud output

[dlawin]

The --dbt --cloud output is extremely basic at the moment:

Running with data-diff=0.5.0

INTEGRATION.BEERS_test_custom_schema.simple_example <> DEV.DBT_DEV_DAN_test_custom_schema.simple_example
    Diff in progress:
    https://app.datafold.com/datadiffs/<diff_id>/overview

INTEGRATION.BEERS.simple_example_downstream <> DEV.DBT_DEV_DAN.simple_example_downstream
    Diff in progress:
    https://app.datafold.com/datadiffs/<diff_id>/overview

Diffs Complete!

Describe the solution you'd like
Add functionality to poll /api/v1/datadiffs/<diff_id>/summary_results and also display high level results in the command line

[dlawin]

@williebsweet feel free to change/add anything

[dlawin]

I'm addressing #387 alongside this issue

[williebsweet]

@dlawin Is there a PR for this?