Added Bricks content and archive templates

Property	Value
description	Added the baseline content and archive template set for legal, post, and archive rendering.

• Added the Index Bricks template and applied it to the legal post type.
• Added the Post Bricks template and applied it to the post and blog post types.
• Added the Category Bricks template and applied it to the category and post_tag archives.
• Added the Author Bricks template and applied it to the author archive.
• Added the Date Bricks template and applied it to the date archive.
• Shipped the baseline with dedicated content and archive templates instead of a single generic fallback.