feat: add GitHub workflow

[pnlinh]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a GitHub workflow for automated Docker image building and deployment, along with support for PHP 8.4 in the build configuration.

• Introduces automated CI/CD pipeline for building and pushing Docker images to DockerHub
• Adds PHP 8.4 support to the build and test processes
• Configures workflow to trigger on pushes to main, tags, and pull requests

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
.github/workflows/build.yaml	Adds new GitHub Actions workflow for building and pushing Docker images
Makefile	Adds PHP 8.4 support to release-all and test-all targets

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