Docs: Add missing supports to "Block API Reference > Supports" page #59735
Description
The Supports page on the Block Editor Handbook should list all the support available for the latest Gutenberg. However, when checked against the block's JSON schema, support for the following seems to be missing:
- color.heading
- color.button
- color.enableContrastChecker
- background
- background.backgroundImage
- background.backgroundSize
- renaming
- shadow