docs: update readme

[fmorency]

This pull request updates the README.md to improve its appearance and provide more relevant project information. The most important changes are focused on branding and up-to-date status badges.

Documentation and branding improvements:

• Changed the main heading to a centered HTML <h1> and added a project logo image for better branding and visual appeal.
• Replaced the CircleCI badge with a GitHub Actions workflow status badge and added a Go Report Card badge to reflect the current CI/CD setup and code quality.

[Copilot]

Pull Request Overview

This pull request updates the README.md documentation to modernize the project's presentation and reflect current CI/CD infrastructure. The changes focus on improving visual branding and updating status badges to match the current tooling.

• Replaced plain markdown heading with centered HTML heading and added project logo for better visual presentation
• Updated CI status badges from CircleCI to GitHub Actions and added Go Report Card for code quality tracking

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