Add support for parquet files to tabulator

The parquet file type could be supported in tabulator in the future - we're currently working on implementing the missing metadata, so there should be a PR soon. This would allow nice visualizations of the files and would remove the need to implement the preview and peek in the datatype.

Start by locating the tabulator integration and the datatype preview and peek handling mentioned in the issue. Review the metadata work already in progress, then verify that parquet files can be displayed in tabulator without separate preview or peek implementations.

Written by the indexing model from the issue text.