PR review flow integration: Terraform plan + Ansible dry-run

This is a good time and repository to show the PR flow with BitOps.
https://github.com/bitovi/bitops/issues/325

When using this GH Action, on every PR the terraform should run plan, and ansible should run dry-run,
show the result as a GH Status check.
Once the PR is approved and merged, - run the actual terraform apply.

Bonus points if we could post the `tf plan` diff back to the PR as a comment.

See https://github.com/marketplace/actions/terraform-pr-commenter#screenshots as an example:

StackStorm is a complex beast and allowing users to run the proper PR review flow instead of "I'm feeling lucky" `apply` would prevent users from shooting themselves in the foot and encourage best practices.

Parte del punto de entrada de GitHub Action del repositorio y sigue cómo se invocan las ejecuciones de despliegue de Terraform y Ansible. Define el flujo de la PR en torno a Terraform plan, Ansible dry-run, las comprobaciones de estado de GitHub y apply después del merge; el comentario de diff de Terraform opcional es un alcance adicional. Se considera completado cuando el workflow distingue de forma segura entre las ejecuciones de revisión y las ejecuciones de despliegue tras el merge.

Escrito por el modelo de indexación a partir del texto del issue.