Add GitHub Action to deploy and test the plugin in a target environment

[GiuseppeArcifa]

Proposed changes

See: PRESS0-1986

This PR introduces a new GitHub Action workflow to automate the deployment and testing of the plugin in a specified environment.

The workflow follows these steps:

• Install all dependencies (Node and Composer)
• Build the plugin
• Create the ZIP archive
• Copy the ZIP file to the remote server
• Install and activate the plugin via WP-CLI
• Check if the remote URL is accessible
• Run the specified Cypress tests on the remote installation

Type of Change

Production

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update
• Refactoring / housekeeping (changes to files not directly related to functionality)

Development

• Tests
• Dependency update
• Environment update / refactoring
• Documentation Update

Video

Checklist

• I have read the CONTRIBUTING doc
• I have viewed my change in a web-browser
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[GiuseppeArcifa]

Note: before merging the PR we can change the tests that will be run while its execution and the environments.

At the moment the Cypress test that will be ran is just one from the integration folder that perform simple checks.
While or the environment the only one at the moment is the bluehost-shared, we can setup multiple environments for staging / production / test purposes.

Both changes can be done just editing the deploy-and-test.yml file and then configuring the secrets and variables in the specific GitHub Repository environments

[wpscholar]

Looks good. Once we get this deployed, we'll start writing some live tests for onboarding.

[wpscholar]

We should update this to use Node 20, like the plugin does. See https://github.com/newfold-labs/wp-plugin-bluehost/blob/main/.nvmrc

[GiuseppeArcifa]

updated to use Node v20

[wpscholar]

We should add a note here about the purpose of this waiting.

[GiuseppeArcifa]

Updated the name of the Step in "Check if the remote Server is up" as it just checks if the site_url in which should be run the cypress test is reachable