GitHub Actions summary markdown

[remcotolsma]

GitHub recently released the markdown support for the action summary. It'd be nice if this action can leverage that feature to provide useful information on the action Summary.

• GitHub Actions summary markdown 10up/action-wordpress-plugin-deploy#91
• https://github.blog/2022-05-09-supercharging-github-actions-with-job-summaries/
• https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions#adding-a-job-summary

Ideas:

• Link to https://wordpress.org/plugins/salesfeed/.
• List of modified paths Subversion
• List of added paths Subversion
• List of removed paths Subversion
• Link to https://plugins.svn.wordpress.org/salesfeed/tags/1.3.3/
• Link to https://plugins.trac.wordpress.org/browser/salesfeed/tags/1.3.3
• List of executed commands