Feature: #96983 - TCA type "folder"

See forge#96983

Description

A new TCA type folder has been introduced, which replaces the old combination of type => 'group' together with internal_type => 'folder'. Other than that, there is nothing new about this type.

Example usage:

'columns' => [
    'aColumn' => [
        'config' => [
            'type' => 'folder',
        ],
    ],
],
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Impact

You may now use the new TCA type folder as a quicker way to define a field, which can select multiple folders in an element browser window.