Woocommerce Product Finder 1.4.1

* Tweak - Tested compatibility up to WC 8.0.
* Tweak - Tested compatibility with WP 6.3.
* Dev - Refactored widget class by extending the class `WC_Widget`.
* Dev - Deprecated class `WC_Product_Finder_Widget`.
* Dev - Updated the minimum requirements to WC 3.7, WP 4.9, and PHP 5.6.

* Feature - Declare compatibility with WooCommerce High-Performance Order Storage (HPOS).
* Tweak - Added links to the plugin settings, the documentation page, and to get support, in the plugin list.
* Tweak - Updated plugin author.
* Tweak - Tested compatibility up to WC 7.6.
* Tweak - Tested compatibility up to WP 6.2.
* Dev - Use SASS instead of LESS for generating the CSS styles.
* Dev - Implement the singleton pattern in the main plugin class.
* Dev - Updated the minimum requirements to WC 3.5, WP 4.7, and PHP 5.4

* Dev - Add branch-labels GH workflow.
* Dev - GH release config and the new PR template.
* Tweak - WC 6.9 compatibility.