Feat: Metric / Imperial Switcher

[mgiannopoulos24]

Description

This PR introduces a new feature to switch between Metric and Imperial units through a simple dropdown menu.

Related issues

Closes issue #145 and #64.

Changes

File	Change
.wp-env.json	Removed deprecated options that are not required on the latest version
assets/css/style.css	Styling for the unit label with an icon
assets/js/cooked-functions.js	A new function for the switcher
composer.json	Addition of php-units-of-measure library
includes/class.cooked-cli.php	PHPCS fixes
includes/class.cooked-import.php	Addition of links for sample data
includes/class.cooked-measurements.php	Addition of new field for measurement system
includes/class.cooked-plugin-extra.php	PHPCS fixes
includes/class.cooked-recipes.php	Addition of the dropdown on the frontend
includes/class.cooked-unit-converter.php	A unit converter utility that utilizes the units of measure library
tests/phpunit/UnitConverterTest.php	Unit test for the new feature

Screenshots

Disable Switcher option:

Sample file links:

Measurement system dropdown:

Metric system showcase

Checklist

Please check if your PR fulfills the following requirements:

• Tested in latest version of WordPress
• No JavaScript errors or warnings in the console
• No PHP errors or warnings logs
• Generate language files, if necessary
• Extended the README / documentation / etc, if necessary