Themes: Allow non-block themes to add theme support for link color settings.

This changeset themes without theme.json to opt-in to block link color tools via `add_theme_support( 'link-color' );`.

Follow-up to [55067], [55273].

Props poena, audrasjb.
Fixes #58597.



Built from https://develop.svn.wordpress.org/trunk@55996


git-svn-id: http://core.svn.wordpress.org/trunk@55508 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-theme-json-resolver.php

@@ -315,6 +315,11 @@ class WP_Theme_JSON_Resolver {
 			// Classic themes without a theme.json don't support global duotone.
 			$theme_support_data['settings']['color']['defaultDuotone'] = false;
 
+			// Allow themes to enable link color setting via theme_support.
+			if ( current_theme_supports( 'link-color' ) ) {
+				$theme_support_data['settings']['color']['link'] = true;
+			}
+
 			// Allow themes to enable all border settings via theme_support.
 			if ( current_theme_supports( 'border' ) ) {
 				$theme_support_data['settings']['border']['color']  = true;

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-alpha-55995';
+$wp_version = '6.3-alpha-55996';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.