Add Gutenberg Block(s) to render Bylines for Full Site Editing

# User Story

> As an admin using Full-Site Editing, I want to be able to use Byline Manager bylines in a block theme.

# Acceptance Criteria

- Create a Gutenberg block for use in full-site editing that displays author data from Byline Manager instead of standard WordPress authors.
- Make this block available in the same contexts as the core author block, such as in the post template and query loop blocks, so it can be used on single pages and post listings.
- Ensure there is support for setting attributes to allow the user to leverage all of the options currently available in https://github.com/alleyinteractive/byline-manager/blob/production/inc/template-tags.php.