Added an advanced editor of fields for the Order Form.

Added an advanced editor of fields for the Order Form. You can create up to 50 fields, with different data types (text fields, strings, sending files, chachkbox and select elements). Form management is located in the settings, in the "Shop", "Checkout" tab.

Added conversion of images to WEBP format when uploading through the file manager.
Added the "Attachment level" parameter to the main menu items
Additional text filtering has been added to all orders and forms on the site