This PR adds new table evaluation metrics prepared by @leah1985
The metrics include:
- `table count` (check)
- `table_level_acc` - accuracy of table detection
- `element_col_level_index_acc` - accuracy of cell detection in columns
- `element_row_level_index_acc` - accuracy of cell detection in rows
- `element_col_level_content_acc` - accuracy of content detected in
columns
- `element_row_level_content_acc` - accuracy of content detected in rows
TODO in next steps:
- create a minimal dataset and upload to s3 for ingest tests
- generate and add metrics on the above dataset to
`test_unstructured_ingest/metrics`
