Add Dema Consulting icon to NuGet package

[Copilot]

Pull Request

Description

SarifMark NuGet package was missing the standard Dema Consulting branding icon. This adds the same Icon.png used across other Dema Consulting packages.

Changes:

• Added Icon.png (128x128 PNG, 3.8KB) to repository root
• Configured PackageIcon property in .csproj
• Added icon to NuGet package contents via <None Include> directive

Type of Change

• 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 not work as expected)
• Documentation update
• Code quality improvement

Related Issues

References the feature request for adding NuGet package icon.

Pre-Submission Checklist

Before submitting this pull request, ensure you have completed the following:

Build and Test

• Code builds successfully: dotnet build --configuration Release
• All tests pass: dotnet test --configuration Release
• Code produces zero warnings

Code Quality

• Code formatting is correct: dotnet format --verify-no-changes
• New code has appropriate XML documentation comments
• Static analyzer warnings have been addressed

Quality Checks

Please run the following checks before submitting:

• Spell checker passes: cspell "**/*.{md,cs}"
• Markdown linter passes: markdownlint "**/*.md"
• YAML linter passes: yamllint '**/*.{yml,yaml}'

Testing

• Added unit tests for new functionality
• Updated existing tests if behavior changed
• All tests follow the AAA (Arrange, Act, Assert) pattern
• Test coverage is maintained or improved

Documentation

• Updated README.md (if applicable)
• Updated ARCHITECTURE.md (if applicable)
• Added code examples for new features (if applicable)
• Updated requirements.yaml (if applicable)

Additional Notes

Icon sourced from demaconsulting/SonarMark repository for brand consistency. Package metadata configuration follows NuGet best practices for embedding package icons.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[Feature]: Add Icon to NuGet package</issue_title>
<issue_description>### Problem Statement

The SarifMark is missing its icon.

Proposed Solution

Copy the Dema Consuilting Icon.png from https://github.com/demaconsulting/SonarMark and then include it as the NuGet package icon.

Alternatives Considered

No response

Usage Examples

Benefits

Standard branding for Dema Consulting packages.

Priority

Low - Nice to have

Willingness to Contribute

Yes, I can submit a pull request

Additional Context

No response

Checklist

• I have searched existing issues to ensure this is not a duplicate
• I have provided a clear description of the feature
• I have explained why this feature would be useful</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [Feature]: Add Icon to NuGet package #32

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