Merge pull request #372 from wp-cli/copilot/add-loading-for-rtl-css

`scaffold child-theme`: add RTL stylesheet support via `wp_style_add_data()`

Author: swissspidy

features/scaffold.feature

@@ -9,6 +9,10 @@ Feature: WordPress code scaffolding
     When I run `wp scaffold child-theme zombieland --parent_theme=umbrella --theme_name=Zombieland --author=Tallahassee --author_uri=https://wp-cli.org --theme_uri=http://www.zombieland.com`
     Then the {THEME_DIR}/zombieland/style.css file should exist
     And the {THEME_DIR}/zombieland/functions.php file should exist
+    And the {THEME_DIR}/zombieland/functions.php file should contain:
+      """
+      wp_style_add_data( 'zombieland-style', 'rtl', 'add' );
+      """
     And STDOUT should be:
       """
       Success: Created '{THEME_DIR}/zombieland'.

templates/child_theme_functions.mustache

@@ -20,4 +20,5 @@ function {{prefix_safe}}_parent_theme_enqueue_styles() {
 		array( '{{parent_theme}}-style' ),
 		'0.1.0'
 	);
+	wp_style_add_data( '{{slug}}-style', 'rtl', 'add' );
 }