Provide a function to make Query Results returned as a list of dict

[eddyxu]

Currently we only support .to_df() on the Query object.

[prrao87]

As an add-on to this, does it make sense to name the .to_df() method more explicitly such that the user knows it references pandas (for when polars is fully supported in the future)? There is already a .to_pandas() method in the table API, which I assume was named this way for this very reason. .to_df() is ambiguous for a framework that supports both pandas and polars dataframes. In the longer run, it would be awesome to use .to_arrow(), .to_pandas() or .to_polars(), for both the table and query result APIs, to keep things consistent and easy to remember.

[changhiskhan]

we have to_list() now