v1.0.0

• Initial release.
• Implemented a dynamic file extension badge feature generated from the media MIME/subtype (positioned at the top-left).
• Implemented a pixel dimensions display feature using monospace typography that retrieves and shows width and height metadata (positioned at the top-right).
• Implemented a lightweight checkerboard background for transparent images, rendered using pure CSS linear-gradient.
• Implemented database saving and management fields for color labels utilizing the attachment_fields_to_edit and attachment_fields_to_save hooks.
• Implemented a real-time, topmost overlay border synchronization logic by extending wp_prepare_attachment_for_js and the Backbone.js attachment render prototype.