Consolidate asset documentation and clarify RTL support (v1.6.28)

assets/screenshots/README.md

@@ -1,7 +1,14 @@
-# WordPress.org Screenshot Requirements
+# WordPress.org Screenshot Files
 
-For WordPress.org plugin submission, you need:
+This directory contains screenshot files for the WordPress.org plugin repository.
 
-1. Screenshot in PNG format
-2. Named `screenshot-1.png`
-3. Place it in the `/assets/` directory of your WordPress.org SVN repository
+## Files in this Directory
+
+- `screenshot-1.png` - Main screenshot showing the plugin in action
+- `screenshot-1.pxd` - Source file for editing in Pixelmator
+
+## WordPress.org Submission
+
+For detailed information about WordPress.org screenshot requirements and submission process, please see the main asset documentation:
+
+[WordPress.org Plugin Submission Assets Guide](../WORDPRESS_ORG_ASSETS.md)