a kind of online equivalent of `swh identify`.
Such a service should allow a user to:
- upload a file,
- upload a directory (probably as a zip-like),
- upload a (supported) package file (python source package, cran, etc.)
- (can we/how to handle a non-git revision?)
and get a clear answer showing:
- the SWHID of the submitted content (with possibility to navigate, when it's a directory )
- whether it is known by SWH or not
Note that we currently have a simple version of this service on the main web page, but only for files. The proposed service should be able to replace this, and possible available as a public API, or maybe a pure js implementation so the computation is made client side.