This commit enhances the README.md file to better showcase the capabilities of ImageSorcery MCP.

The following changes were made:

- Updated the description to emphasize local image processing.
- Removed the "Without ImageSorcery MCP" section, as the benefits are now highlighted in the "With ImageSorcery MCP" section.
- Added "Add logos and watermarks" to the list of features.
- Added "Do all of this **locally**, without sending your images to any servers" to emphasize local processing.