feat: add publish to wordpress svn action

[MaferMazu]

Description

This PR create and use a github action to publish the code in our WordPress SVN. The implementation is based on richard-muvirimi/deploy-wordpress-plugin workflow.

Testing instructions

I tested this action here https://github.com/eduNEXT/openedx-wordpress-ecommerce/actions/runs/12170352292/job/33945121718
And it worked as expected.
I had the 2.0.6 version, and the workflow added the 2.0.7.

To see the SVN https://svn.riouxsvn.com/openedx-commerc

Additional information

Related to #97

Checklist for Merge

• Tested in a remote environment
• Updated documentation (N/A)
• Rebased master/main
• Squashed commits

[openedx-webhooks]

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[feanil]

Looks like that repo has not seen any updates in 2 years, are we sure about this. As this is a commerce plugin I'm more wary of using 3rd party workflows for deploying the code to wordpress.

[MaferMazu]

That's the best workflow I've found. But it is okay if we want to maintain an action for security; I could work on it at the end of the week.

[MaferMazu]

@feanil @felipemontoya I updated this PR. I extract the main functions of the existing workflow to create our action.

I tested this action here https://github.com/eduNEXT/openedx-wordpress-ecommerce/actions/runs/12170352292/job/33945121718
And it worked as expected.
I had the 2.0.6 version, and the workflow added the 2.0.7.

To see the SVN https://svn.riouxsvn.com/openedx-commerc