feat: update patterns and remove unused files

[thomasguillot]

This PR takes the various patterns to the next level. Making the most of the Editor instead of relying on custom CSS.

I've also removed a bunch of unused files.

Temp demo: https://speedily-given.wp.build/media-kit/

How to test

1- Install this plugin, activate it
2- Go to edit the new Media Kit page created (note: you will need to permanently delete any previously created)
3- Check if it works as expected (please use the block theme for now. if you use the classic theme, the colours will be missing)

[github-actions]

@thomasguillot thanks for the PR! Could you please fill out the PR template with description, changelog, and credits information so that we can properly review and merge this?

[dkoo]

@thomasguillot I'll test this after #1 is merged

[thomasguillot]

@dkoo the PR should be up-to-date with the main branch. I hope it didn't break everything 🥺

[dkoo]

@thomasguillot on a fresh site, when activating the plugin I see this fatal in PHP log:

[02-Jul-2024 23:21:00 UTC] PHP Fatal error:  Uncaught Error: Class "PublisherMediaKit\blocks\BlockContext\Tabs" not found in /newspack-repos/publisher-media-kit-for-newspack/publisher-media-kit.php:102
Stack trace:
#0 /var/www/html/wp-admin/includes/plugin.php(2389): include_once()
#1 /var/www/html/wp-admin/includes/plugin.php(675): plugin_sandbox_scrape()
#2 /var/www/html/wp-admin/plugins.php(60): activate_plugin()
#3 {main}
  thrown in /newspack-repos/publisher-media-kit-for-newspack/publisher-media-kit.php on line 102

It doesn't seem to affect the content of page itself, though

[thomasguillot]

@dkoo For some reason I can't replicate the error.

I noticed in https://github.com/10up/publisher-media-kit/pull/125/files they removed require_once PUBLISHER_MEDIA_KIT_INC . '/classes/blocks/BlockContext/Tabs.php';. Do you think this could be related?

[dkoo]

Not seeing the error anymore on JN—I'm going to go ahead and approve.