Remove DIDGet from SAL protocols and add support for stateless steps

Stateless steps can be called at any time, even intermixed with ordered steps. Usually this kind of
steps are needed in classical crypto protocols (e.g. Generic Crypto), whereas EAC has a strinctly
ordered semantic.
Set expected result status (9000 and 6282) for readFile helper
Remove implcit rules from EAC DID
Fix VerifyUser user consent and beautify IFD code