Upgrade blocks to apiVersion 2

[sc0ttkclark]

We should look at upgrading our blocks to apiVersion 2 (WP 5.6+) and determine what's necessary to support that. I tried briefly and none of the blocks could be selected but they could be added / set options / used. Upon going to add another block or edit the title, you can't select any of our blocks anymore.

https://developer.wordpress.org/block-editor/reference-guides/block-api/block-api-versions/

• To render the block element wrapper for the block’s edit implementation, the block author must use the useBlockProps() hook.
• The generated class names and styles are no longer added automatically to the saved markup for static blocks when save is processed. To include them, the block author must explicitly use useBlockProps.save() and add to their block wrapper.