…ypes

Block style variations can now also contain inner block type and element styles. Currently the inner block styles are not recursive in that they do not support nested style variations.

Includes:
- absorbing block style variations from the block styles registry into theme.json
- updating metadata and stylesheet generation from variations to support inner block and element styles

…Styles

This initial approach will restrict the block style variations configurable within Global Styles to core block styles and those registered and possessing matching styles within the base theme.json.

Think change is still up for debate. If accepted it may be a breaking change that needs plenty of communication.

…ificity

…neration

This ensures that element styles placed upon a block instance by the user take precedence over element styles for a block type within a block style variation e.g. `styles.blocks.core/group.variations.custom.blocks.core/media-text.elements`

…n styles"

This reverts commit a003477.

…e editor"

This reverts commit 562a9fa.

… node generation"

This reverts commit 9aca87e.

…ent"

This reverts commit 15270b6.