Limit CSV fields on export output

Needed for socface
Refs https://redmine.teklia.com/issues/3267

When building a CSV file using arkindex export csv, we need a new option that allows to limit columns in the CSV.

This dev brings a new option named -f or --field that a user can specify multiple times to limit columns:

arkindex export path/to/db.sqlite csv --output test.csv -f id -f created -f entity_*

should only output the columns:

• id
• created
• all that start with entity_

A user may specify a pattern to match multiple keys (this is required for generated column names like for metadata & entities): you should use the fnmatch.filter method as it supports everything we would ever need.

Please do not alter the CSV workflow, I do not need to dynamically disable any part of the csv generation: you just need to filter out what will be in the output.

Don't forget to document that in the public markdown documentation (especially the fnmatch.filter part !)