glerner gl-color-palette-generator .cursorrules file for PHP

Make the code functional, executable. Make the code documented and all code have PHPUnit tests.
Update the Existing code, to make the plugin functional. Don't start over!
Update existing code, using existing files, with code documentation and testing. Write missing code.
The plugin follows WordPress coding standards with hyphenated filenames.
Use PHP Namespaces throughout the code
Add code documentation and tests for all code
Use minimum PHP version 8.0, and minimum WordPress version 6.0
Use these throughout the plugin
 * Plugin URI:        https://github.com/GeorgeLerner/gl-color-palette-generator
 * Requires at least: 6.2
 * Requires PHP:      8.0
 * Author:            George Lerner
 * Author URI:        https://website-tech.glerner.com/
 * Update URI:        https://website-tech.glerner.com/plugins/color-palette-generator/
 * @author  George Lerner
 * @link    https://website-tech.glerner.com/

## To align with WordPress coding standards for a plugin, especially for version 6.7, we should follow the guidelines for naming conventions, which typically include:
1. File Names: Use lowercase letters with hyphens to separate words.
2. Class Names: Use PascalCase (also known as UpperCamelCase).
3. Function Names: Use snake_case (lowercase letters with underscores).

## Rules for Markown .md edits
- When proposing an edit to a markdown file, first decide if there will be code snippets in the markdown file.
- If there are no code snippets, wrap the beginning and end of your answer in backticks, and specify markdown as the language.
- If there are code snippets, wrap the beginning and end of your answers inside 5 backticks. output the markdown content as free text. You may use backticks for code snippets within the markdown content.

Please consult the @Codebase for overall details and locate the information or file you need. You may be able to access them directly.
Refer to the @project_structure.txt file for a structured view of the project’s relevant files (.ts, .js, .json, .md, .ps1) and directories. Note that standard development folders (node_modules, .git, .vscode), hidden files, and package-lock.json are excluded from this view.