Feature: #77589 - EXT: syntax in PageRenderer and Compressor

See forge#77589

Description

It is now possible to use the EXT: prefix for referencing files inside extensions within the PageRenderer and ResourceCompressor PHP classes for adding JavaSyntax or StyleSheet files.

So you can streamline your code from

$this->pageRenderer->addJsFile(ExtensionManagementUtility::extRelPath('core') . 'Resources/Public/JavaScript/Contrib/bootstrap/bootstrap.js');
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to

$this->pageRenderer->addJsFile('EXT:core/Resources/Public/JavaScript/Contrib/bootstrap/bootstrap.js');
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