feat: add progress bar for magics

[HemangChothani]

Fixes #389

[tswast]

I think tqdm would be fine default value here

[HemangChothani]

If i put tqdm as a default value anywhere in the code, test_jupyter_tutorial(ipython) snippet failed, you can see in the first commit. It's because tqdm is not installed.

[tswast]

That's because there's a bug in the progress bar code.

       if progress_bar_type is None:
            return query_job.result()

This is too soon to check if a progress bar can be supported. We should check if progress_bar is None after

        progress_bar = get_progress_bar(
            progress_bar_type, "Query is running", default_total, "query"
        )

Something like

        """Return query result and display a progress bar while the query running, if tqdm is installed."""
        progress_bar = get_progress_bar(
            progress_bar_type, "Query is running", default_total, "query"
        )
        if progress_bar is None:
            return query_job.result()

        default_total = 1
        current_stage = None
        start_time = time.time()