[2] Feat: Manifest validation

[redaranj]

Changes in this pull request

• Adds manifest validator to check correctness before passing the structure to the underlying library
• Adds manifest convenience functions
• Updates for 2.3 spec compliance

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• All applicable changes have been documented
• Any TO DO items (or similar) have been entered as GitHub issues and the link to that issue has been included in a comment

[codecov]

Codecov Report

❌ Patch coverage is 84.25926% with 68 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.90%. Comparing base (e62ba32) to head (647d354).

Files with missing lines	Patch %	Lines
...org/contentauth/c2pa/manifest/ManifestValidator.kt	73.17%	16 Missing and 6 partials ⚠️
...g/contentauth/c2pa/manifest/AssertionDefinition.kt	62.74%	8 Missing and 11 partials ⚠️
...n/org/contentauth/c2pa/manifest/ActionAssertion.kt	34.61%	17 Missing ⚠️
...tentauth/c2pa/manifest/ManifestValidationResult.kt	57.14%	2 Missing and 1 partial ⚠️
...ary/src/main/kotlin/org/contentauth/c2pa/Action.kt	85.71%	2 Missing ⚠️
...ry/src/main/kotlin/org/contentauth/c2pa/Builder.kt	75.00%	1 Missing and 1 partial ⚠️
...kotlin/org/contentauth/c2pa/manifest/Ingredient.kt	83.33%	2 Missing ⚠️
...n/kotlin/org/contentauth/c2pa/manifest/TimeType.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #48      +/-   ##
============================================
+ Coverage     65.78%   69.90%   +4.12%     
- Complexity        9       40      +31     
============================================
  Files            56       58       +2     
  Lines          1920     2190     +270     
  Branches        218      250      +32     
============================================
+ Hits           1263     1531     +268     
+ Misses          510      502       -8     
- Partials        147      157      +10     

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