[HelpHub] Overhaul Blocks List Page

Issue Description

Blocks LIst page is missing recent changes to core blocks.

URL of the Page with the Issue

https://wordpress.org/documentation/article/blocks-list/

Section of Page with the issue

Blocks List and Deprecated Blocks

Why is this a problem?

This page is a great reference for new WordPress editors but is missing some info.

Suggested Fix

Add new blocks

Text Blocks:

• Math
• Stretchy Paragraph (variation mentioned in paragraph)*
• Stretchy Heading (variation mentioned in heading)*

Design Blocks:

• Accordion

Widget Blocks

• Terms List
• Categories List
• (Move Categories under Theme)

Theme Blocks

• Categories (Move from Widget Blocks)
• Query Title
• Term Count
• Term Name
• Terms Query
• Post Type Label

*Stretchy Paragraph and Stretchy Heading are both listed in the inserter, but maybe don't need to have links here. Other block variations such as Grid group and YouTube embeds are listed though.

Block Deprecation

• Posts List block
  • Page here: https://wordpress.org/documentation/article/posts-list-block/
  • From PR !63404 https://github.com/WordPress/gutenberg/pull/63404