Linking to folders in addition to the assets

[m-mohr]

We had the desire to, in addition to the assets, link to specific folders e.g. on S3, so that people can download the whole folder (with some additonal files not exposed as asset) a little more easily.

I'm not sure whether the storage extension is the right place, but we thought about expressing this as a link, e.g.

{
    "rel": "enclosure",
    "href": "s3://company/Sentinel-2/MSI/L1C/2025/06/17/S2B_MSIL1C_20250617T061629_N0511_R034_T48XWK_20250617T064852.SAFE/",
    "type": "application/x-directory",
    "title": "S3 path to source directory",
    "auth:refs": ["s3"],
    "storage:refs":["company-s3"]
}

Documenting it here for now so that others can find it and to discuss the solution for potential adoption in one of the STAC extensions.