feat: add logger interface and implementation for better logging in actions

[Coderrob]

Description

chore: update package.json to include jscpd and madge for code duplication analysis
build: create rollup.config.js for ES module bundling
fix: modify rollup.config.ts to handle circular dependency warnings
test: refactor action tests to use ILogger for logging
refactor: update Action class to use ILogger for logging instead of core
docs: add JSDoc comments for Action class and methods
chore: update tsconfig.json for better module isolation
chore: add tsconfig.test.json for test-specific TypeScript configuration

Checklist

• Changes have been tested locally.
• Documentation has been updated accordingly.
• Changes have been verified to have no runtime errors.

[Copilot]

Pull Request Overview

This PR introduces a logger abstraction layer to improve testability and maintainability of the GitHub Action by replacing direct @actions/core usage with an ILogger interface. It also includes build configuration improvements and enhanced documentation.

Key changes:

• Adds ILogger interface and CoreLogger implementation for better dependency injection
• Refactors Action class to use ILogger instead of direct @actions/core calls
• Updates build configuration with new rollup.config.js and circular dependency handling
• Adds comprehensive project documentation and EditorConfig setup

Reviewed Changes

Copilot reviewed 12 out of 17 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/logger.ts	New logger interface and implementation wrapping @actions/core
src/action.ts	Refactored to use ILogger dependency injection with JSDoc documentation
src/action.test.ts	Updated tests to use mocked ILogger instead of @actions/core
src/index.ts	Added JSDoc documentation and improved function structure
rollup.config.js	New ES module build configuration with circular dependency handling
package.json	Added jscpd, madge tools and updated build scripts
tsconfig.test.json	Added isolatedModules setting for better module isolation
README.md	Comprehensive documentation of project structure and usage
.editorconfig	Added consistent coding style configuration

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