Maintenance: Ensure composer.json completeness and accuracy

Problem/Motivation

The initial composer.json for myrest contains basic metadata and a core dependency. To ensure the module can be correctly managed via Composer and integrated with the Drupal.org infrastructure, it needs a thorough audit.

Proposed resolution

• Verify that all required PHP extensions and third-party libraries are listed in the require section.
• Ensure all keywords, authors, and support links are accurate and up-to-date.
• Add suggest section if there are optional dependencies (like myfacet or metatag).

Remaining tasks

Audit the codebase for external dependencies and update composer.json accordingly.