JSONAPI filter support

[johanjanssens]

Implement support for the JSONAPI filter query parameter

• https://gist.github.com/e0ipso/efcc4e96ca2aed58e32948e4f70c2460
• https://laravel-json-api.readthedocs.io/en/latest/fetching/filtering/
• https://discuss.jsonapi.org/t/share-propose-a-filtering-strategy/257/20
• https://elide.io/pages/guide/10-jsonapi.html
• https://specs.openstack.org/openstack/api-wg/guidelines/pagination_filter_sort.html#filtering
• https://tools.ietf.org/html/draft-nottingham-atompub-fiql-00#page-4

RSQL

• https://github.com/jirutka/rsql-parser
• https://aboullaite.me/rsql/
• https://github.com/oilstone/php-rsql-parser
• https://discuss.jsonapi.org/t/share-propose-a-filtering-strategy/257/20

[johanjanssens]

Research taxonomies related to filtering

• https://learn.getgrav.org/16/content/taxonomy
• https://docs.bolt.cm/2.2/content/taxonomies

[johanjanssens]

Initial implementation basic schema based filtering using: https://laravel-json-api.readthedocs.io/en/latest/fetching/filtering/ approach