Changeset 55133 for trunk/tests/phpunit/data/themedir1/block-theme-child-with-fluid-typography-config/theme.json

Editor: Adds 'settings.typography.fluid.minFontSize' support to wp_get_typography_font_size_value().

In wp_get_typography_font_size_value(), adds support for using a minimum font size for fluid typography when defined in a theme's theme.json file.

Reference:

• Part of ​Gutenberg PR 42489

Follow-up to [54497], [54260].

Props andrewserong, ramonopoly, hellofromTonya, joen.
Fixes #57529.