[3] Fix: Doc / code style / naming cleanup

[redaranj]

Changes in this pull request

• Makes the code and docs more internally consistent

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 59.29577% with 289 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.27%. Comparing base (16dcd0b) to head (0f0c09e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...org/contentauth/c2pa/manifest/SettingsValidator.kt	42.08%	122 Missing and 39 partials ⚠️
...org/contentauth/c2pa/manifest/ManifestValidator.kt	62.71%	30 Missing and 14 partials ⚠️
...n/org/contentauth/c2pa/manifest/ImageRegionType.kt	11.76%	14 Missing and 1 partial ⚠️
...ary/src/main/kotlin/org/contentauth/c2pa/Stream.kt	55.55%	8 Missing and 4 partials ⚠️
...ontentauth/c2pa/manifest/StandardAssertionLabel.kt	42.10%	10 Missing and 1 partial ⚠️
...ary/src/main/kotlin/org/contentauth/c2pa/Reader.kt	37.50%	8 Missing and 2 partials ⚠️
...ry/src/main/kotlin/org/contentauth/c2pa/Builder.kt	81.63%	5 Missing and 4 partials ⚠️
...g/contentauth/c2pa/manifest/AssertionDefinition.kt	83.72%	2 Missing and 5 partials ⚠️
...c/main/kotlin/org/contentauth/c2pa/C2PASettings.kt	66.66%	2 Missing and 4 partials ⚠️
...main/kotlin/org/contentauth/c2pa/KeyStoreSigner.kt	33.33%	4 Missing and 2 partials ⚠️
... and 5 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #49      +/-   ##
============================================
+ Coverage     59.82%   62.27%   +2.45%     
- Complexity        9       42      +33     
============================================
  Files            52       58       +6     
  Lines          1558     2118     +560     
  Branches        162      306     +144     
============================================
+ Hits            932     1319     +387     
- Misses          526      628     +102     
- Partials        100      171      +71     

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