Prepare assets for WordPress.org plugin submission (v1.6.23)

assets/icon-png/README.md

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+# WordPress.org Icon Requirements
+
+For WordPress.org plugin submission, you need to:
+
+1. Convert the SVG icon to PNG format
+2. Create a 256x256 pixel version
+3. Name it `icon-256x256.png`
+4. Place it in the root of your SVN assets directory
+
+## How to Convert
+
+You can use tools like:
+- Inkscape (free, open-source)
+- Adobe Illustrator
+- GIMP
+- Online converters like https://svgtopng.com/
+
+## Command Line Conversion (if you have ImageMagick installed)
+
+```bash
+convert -background none -size 256x256 assets/icon/fix-plugin-does-not-exist-notices-icon.svg assets/icon-png/icon-256x256.png
+```
+
+After creating the PNG file, it should be uploaded to the WordPress.org SVN repository in the assets directory.