C2PA v2.1 Updates - ingredients assertion v3

[karlobencic]

This PR includes several important updates to improve validation and error handling in the C2PA SDK according to v2.1 specification:

Key Changes

• New c2pa URN namespace for labelling manifests
• New ingredients v3 assertion
• Updated validation status codes with more specific error categories
• Improved ingredient assertion validation and relationship handling
• Added validation for manifest relationships and ingredients
• Reorganized validation logic in Manifest class

[changeset-bot]

🦋 Changeset detected

Latest commit: d4f3392

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@trustnxt/c2pa-ts	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[cyraxx]

Open tasks:

• Add JSDoc comments for newly created methods
• Implement assertion.undeclared validation (go through all assertions in assertion store and make sure they're referenced by the claim's created or gathered assertions)
• Revisit validation of redactions (zeroed out) – likely to be moved to a new issue unless we can get example data

[cyraxx]

Looks good now, great job!

Just need to make sure we keep track of the two remaining action items: assertion.undeclared validation and validation of redactions.