Various

Layout Grid Block
https://wordpress.org/plugins/layout-grid/#reviews

Full Bleed
https://css-tricks.com/full-bleed/

WORDPRESS: ADD CUSTOM LOGO SUPPORT TO YOUR THEME.
https://since1979.dev/wordpress-add-custom-logo-support-to-your-theme/

Full and wide alignment in Gutenberg
https://www.billerickson.net/full-and-wide-alignment-in-gutenberg/

Displaying Code Snippets on a WordPress Site
https://digwp.com/2012/06/displaying-code-on-a-wordpress-site/

Displaying Code Snippets on a WordPress Site
https://digwp.com/2012/06/displaying-code-on-a-wordpress-site/

Creating an Upcoming Events Plugin in WordPress: Custom Post Type and the Dashboard
https://code.tutsplus.com/tutorials/creating-upcoming-events-plugin-in-wordpress-custom-post-type-and-the-dashboard–wp-35404

Ultimate Guide to Custom Post Types in WordPress
https://typerocket.com/ultimate-guide-to-custom-post-types-in-wordpress/