Add missing type docs and typehints

[mbabker]

Three things here:

1. For all public and protected symbols, adds doc blocks documenting supported types where they were missing
2. For private symbols, adds typehints for with type information
3. Adds the $datetime argument to RefreshTokenManagerInterface::revokeAllInvalid(), callers to the manager are already passing that argument so it's implicitly expected to be there anyway