Pullquotes were not inheriting the correct styling from the block
editor. This commit resolves the issue by supporting typography options.
1. The `font-family` variable remains on the paragraph (both editor and front) so the citation continues to use the body font even when the site redefines `var(--pullquote--font-family)`.
2. The `font-size`, `font-style`, `font-weight`, `letter-spacing` and `line-height` are set on the Pullquote block to allow overriding with the sidebar settings. Then the block's paragraph element inherits those styles.
3. When the settings do not give a custom `line-height` from the sidebar, these stylesheets set the paragraph to `var(--pullquote--line-height)` instead of inheriting 1.6 from the block styles. This patch uses `:where()` to avoid increasing specificity.
Moving styles from the paragraph element to the block should not affect the citation, which has had its own styles for `font-size`, `font-style`, `font-weight` and `letter-spacing`.
Follow-up to [56959], [56451], [55089], [55088], [49574], [49320], [49216].
Props sabernhardt, poena, darshitrajyaguru97, harshgajipara, shailu25, skyakash12.
Fixes#57854.
Built from https://develop.svn.wordpress.org/trunk@57631
git-svn-id: http://core.svn.wordpress.org/trunk@57132 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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