Missing manifest groups/trusts/features lead to an error that is hard to debug

[roman-khimov]

Summary or problem description
nspcc-dev/neo-go#3522

The root cause there is missing groups, trusts and features from manifest. NEP-15 is rather strict about features and somewhat vague on groups/trusts, but we can assume that empty arrays are mandatory (can't be omitted) since that's the way it's implemented in C# and nothing explicitly allows them to be null.

But the problem for me in in these messages:
Missing groups: Value cannot be null. (Parameter 'source').
Missing trusts or features: One of the identified items was in an invalid format..

It'd be hard for a developer to decipher those.

Do you have any solution you want to propose?
Add some more specific errors for these.

Where in the software does this update applies to?

• Ledger