Implement tag-cloud block overrides to support the number parameter to wp_tag_cloud()

[bobbingwide]

Requirement

• To be able to display more than 45 tags in the tag cloud
• See https://sneak-peek.me/blocks/tag-cloud-limitations/

Proposed solution

• Implement a tag cloud override - copy the override logic from sb.
• Use the Additional CSS class(es) field to set the number of tags to list eg number-80
• Discover how to extend the block to do this properly
• Consider adding other $args that are missing.