Add "post" related components

[fabiankaegy]

There are several things that come up again and again when building custom blocks. Whenever we are building integrated hero's, or card blocks we want to be able to control the post title, date, excerpt, author etc.

There are atomic core blocks for most of these components which should be used if possible. But it isn't always possible.

Components to build:

• Post Title
• Post Categories
• Post Primary Category (Power by Yoast SEO)
• Post Author
• Post Authors (Powered by Co Authors Plus)
• Post Excerpt
• Post Featured Image
• Post Tags
• Post Meta Field

The goal here is to be able to build custom blocks like this:

export const BlockEdit = () => {
	const blockProps = useBlockProps();

	return (
		<header {...blockProps}>
			<PostCategory className="wp-block-namespace-article-header__category" />
			<PostTitle className="wp-block-namespace-article-header__title" />
			<div className="wp-block-namespace-article-header__metadata">
				<PostDate className="wp-block-namespace-article-header__date" />
				<PostAuthor className="wp-block-namespace-article-header__author" />
				<PostTimeToRead className="wp-block-namespace-article-header__time-to-read" />
			</div>
		</header>
	);
};