test: Add CI, linting, testing, and SVG utilities

[ReenigneArcher]

Description

Introduces GitHub Actions CI workflow, ESLint configuration, and TypeScript config. Adds SVG utility functions for sponsor handling and refactors their usage in contribkit.config.ts. Expands package.json with metadata, scripts, and test/lint dependencies. Adds comprehensive unit and regression tests for SVG utilities. Updates build.sh for CI compatibility and .gitignore for coverage artifacts.

This resolves several sonar reliability concerns.

Screenshot

Issues Fixed or Closed

Roadmap Issues

Type of Change

• feat: New feature (non-breaking change which adds functionality)
• fix: Bug fix (non-breaking change which fixes an issue)
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semicolons, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit
• BREAKING CHANGE: Introduces a breaking change (can be combined with any type above)

Checklist

• Code follows the style guidelines of this project
• Code has been self-reviewed
• Code has been commented, particularly in hard-to-understand areas
• Code docstring/documentation-blocks for new or existing methods/components have been added or updated
• Unit tests have been added or updated for any new or modified functionality

AI Usage

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts
• Heavy: AI generated most or all of the code changes

[codecov]

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[sonarqubecloud]

Quality Gate failed

Failed conditions
5 New issues
5 New Code Smells (required ≤ 0)

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