Add return to CLI script

[SlowMo24]

When building a tool on sentinelsat, it would be great to be able to reuse the provided CLI. Currently one has to implement their own CLI that will then query the Python-API but of course there will be much duplication to https://github.com/sentinelsat/sentinelsat/blob/main/sentinelsat/scripts/cli.py .

I'm not sure if this a valid use case or feasible (considering that different options return different data).

For example if

sentinelsat/sentinelsat/scripts/cli.py

Line 372 in 7cf7854

footprints_geojson = api.to_geojson(products)

,

sentinelsat/sentinelsat/scripts/cli.py

Line 377 in 7cf7854

downloaded_quicklooks, failed_quicklooks = api.download_all_quicklooks(products, path)

,

sentinelsat/sentinelsat/scripts/cli.py

Line 384 in 7cf7854

downloaded, triggered, failed_downloads = api.download_all(

and

sentinelsat/sentinelsat/scripts/cli.py

Line 400 in 7cf7854

for product_id, props in products.items():

would return their result instead of printing, or duping it, it could be used in other workflows e.g. to further process the downloaded data.

[valgur]

Ok, that would be a fine addition by me. Feel free to create a PR.