including repeats in annotation data for querying

[GavinHuttley]

Minimal data for repeat information is:

• genomic coordinates (coordinate name, start, end, strand)
• repeat classification information, including repeat type, repeat class, score (?)

What is the minimum data needed to download that will provide this? (That is, what are the minimum files required.)

Conceptually separate the download from the install step. The former grabs data in a sufficiently complete form that the install step does not require internet access.

We then need to transform this to be compatible with the querying approach for gene features, perhaps a single table.

[EbiArnie]

This should cover the repeats:
https://github.com/EbiArnie/EnsemblLite/blob/exp/duckdb/experiments/dd_fetch_repeats.py

I don't feel this is ready to be a PR just yet.

The next step would be to integrate this in a smart way. We just talked about that - this would probably replace or augment the current data fetching methods available in EnsemblLite.