better readme

[codecatalyst-integ]

This pull request contains a series of changes to various rehype-related packages, focusing on optimizing and minifying HTML documents. The key changes include:

• Whitespace minification to reduce file size by removing unnecessary whitespace between HTML elements.
• Attribute optimization, such as minifying attribute values, removing redundant attributes, and normalizing attribute casing.
• Script optimization, including concatenating and minifying JavaScript <script> elements, removing unnecessary type attributes, and handling external script content.
• Meta optimization, including minifying <meta> element content and handling meta-related attributes.
• Language minification, reducing the size of language attributes (e.g., lang="en-US" to lang="en").
• Favicon handling, preventing unnecessary network requests for missing favicons.
• Introducing a convenient preset that combines multiple plugins for easy setup and integration.

These changes aim to improve the performance and reduce the file size of HTML documents, making them more efficient to serve and transfer, especially in web development, static site generation, and content delivery network (CDN) scenarios.