Feature: #69389 - Add spinning feature for icon

See forge#69389

Description

The Icon API has now a support for spinning icons. While registering an icon a new property spinning is available:

$iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
$iconRegistry->registerIcon(
	'my-spinning-icon',
	\TYPO3\CMS\Core\Imaging\IconProvider\FontawesomeIconProvider::class,
	array(
		'name' => 'times',
		'spinning' => TRUE
	)
);
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Impact

Icons can now be animated.