Update CCF specs to 1.0.0 by adding support for new types added to Cadence

[fxamacker]

We need to update CCF specification to incorporate changes that were made in Cadence.

Cadence 1.0 added new types, updates (e.g. renaming types), etc. For example:

• rename restricted type to intersection type cadence#2581
• Add support for FunctionType.Purity in CCF codec cadence#3107
• Add support for Attachment and AttachmentType in CCF codec cadence#3131
• Add more support for entitlements (ReferenceType.Authorization) to CCF codec cadence#3139
• etc.

I added the proposed CCF specs changes (as comments using CDDL notion) in the above PRs. They can be reviewed/approved before CCF specs are updated here.

For more details, see PR for this issue:

• Update to CCF Specification 1.0 #7

I found more issues while working on this and opened PRs at onflow/cadence:

• Update CCF CDDL for IntersectionType to match CCF codec cadence#3640
• Fix and improve CCF CDDL in comments cadence#3643

Context

These updates to CCF Specification is needed by this recently opened Cadence issue:

• Expose CCF to Cadence programs cadence#3637

[fxamacker]

Closed by PR #7.

After PR #7 was merged, commit 2e0f2b4 updated the README.