ci: add CI/CD workflow for build, test and publish of mylibrary-frontend

[andresvicentehector]

Summary

This PR introduces a CI/CD pipeline for the MyLibrary frontend using GitHub Actions.

Changes

• Automatically builds Docker images for dev and prod environments.
• Runs unit tests via npm test in both native and Docker environments.
• Publishes Docker images to DockerHub on:
  • Push to main
  • Release publication
  • Manual workflow_dispatch trigger
• Uses GitHub Secrets to handle DockerHub credentials securely.
• Updates DockerHub description on release or dispatch if enabled.

Motivation

To automate and standardize the build and deployment process for the MyLibrary frontend, improving reliability and reducing manual effort.

Checklist

• Build step for Docker images
• Unit tests execution
• Docker-based test execution
• Conditional image publishing
• DockerHub description updates
• Triggered on push, PR, release, dispatch

Closes: #30