Auth scope changes

[RaggedStaff]

PR detailing changes to incorporate scope-based authorization within the DFC Standard

[lecoqlibre]

This work is not aligned with our efforts to move closer to the Solid international consensus especially our previous work on the WebID. For me the DFC should rather move to Solid-OIDC.

If this solution is a transition and a temporary-only solution it should be noticed.

[RaggedStaff]

@simonLouvet requests:

1. Further detail of why this is required (more detail of the Data Permissioning Module).
2. Include details of dfc-t:assignedScope & dfc-t:requiredScope

[RachL]

@lecoqlibre is there a documentation link/paragraph that we could add here to give info on how Solid-OIDC can answer permissions between users?

[lecoqlibre]

OK. There is still work to do but can start with this.

[RaggedStaff]

@lecoqlibre - I can't approve your changes as its my PR, and merging wasn't possible based on your approving review as you were the last pusher. I've pushed a small change, so hopefully (if you re-review) we can get this merged.