Get and list datasets used to mention data sources

[camillemonchicourt]

Actually we request GBIF occurrences API to get species observations and then generate a list of species.
We mention data source in widget footer, but it would be good to also mention datasets used in the data.

When we request occurrences API, we get datasetkey of each occurrence.
It would be good to generate a list of datasetkey and then request GBIF API to get their dataset names.

It seems to be possible in GBIF Registry API : https://techdocs.gbif.org/en/openapi/v1/registry-principal-methods#/Datasets/getDataset
It seems that we can't give a list of datasetkeys to this API but only one datasetkey at a time : https://api.gbif.org/v1/dataset/14d5676a-2c54-4f94-9023-1e8dcd822aa0

The datasets names list could be displayed in the tooltip with more information about the source, and requested/calculated only when hovering this button :

[camillemonchicourt]

First version integrated :

It adds an icon in footer, and when clicking on it, it lists all datasets from occurrences results, the number of occurrences in each dataset and a link to the dataset details in the source website (GBIF by default).

To start, it just lists the UUID that we have in occurrences API results to don't do additional request to the Dataset API, dataset by dataset.