YITH WooCommerce Request a Quote Premium 4.28.0

* New: support for WooCommerce 7.8
* Update: YITH plugin framework
* Fix: resolved an issue with the check of reCAPTCHA, ensuring that the JavaScript trigger only activates when the plugin has reCAPTCHA activated
* Fix: css fix for PDF builder template editor on WordPress 6.1
* Fix: fixed an problem where the expiry date was displayed even when the corresponding option was set to false
* Fix: minor fix for YITH WooCommerce Product Add-Ons string on the quote view

* New: support for WooCommerce 7.7
* Update: YITH plugin framework
* Fix: fixed issue with YITH WooCommerce Multi Vendor plugin
* Fix: fixed the taxes on sold individual items with YITH WooCommerce Product Add-Ons integration
* Fix: fixed issue on editing the request a quote metabox in order page
* Fix: fixed style issues on the mini quote widget
* Dev: added filter yith_wapo_ywraq_total_price to filter the total price of add-ons with YITH WooCommerce Product Add-Ons
* Dev: added filter ywraq_default_deposit_rate to filter standard value of deposit rate

* New: support for WooCommerce 7.6
* Update: YITH plugin framework
* Fix: fixed price calculation on variation products with YITH WooCommerce Product Add-Ons
* Dev: Added hooks to Polylang Plugin integration