Add optional minimal validation about ro-crate-py HOT 4 OPEN

When opening an RO-Crate it would realistically require it to at least be valid JSON - I don't think at the moment it checks it is valid JSON-LD, but that is a RO-Crate requirement as well.

See https://docs.google.com/document/d/1lcmlTTJCcD9sUf6Vv6gRk3URI-CY54R8jK_4R8P3b80/edit# for thoughts on different levels of validation.

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Validation is being needed sooner or later, but an informational one. It is going to be needed the moment the different RO-Crate profiles are going to be supported, in order to report whether the minimal set of properties and structure for a given profile is reached or not

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I would really second this feature-request as it would help us a lot. We want to use RO-crates as import / export for electronic labnotebooks (https://github.com/TheELNConsortium/TheELNFileFormat)

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+1 as well. Just finished adding RO-Crate to Autosubmit on a branch, and now I am trying to validate the RO-Crate somehow. The first pass will be reading the spec & WorkflowHub requirements, but having an automated tool or script would be very helpful.

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