Feature: #82704 - Add readonly and required attributes to TextareaViewHelper

See Issue #82704

Description

The view helper f:form.textarea now supports the attributes readonly and required .

Impact

The attributes readonly and required may be set by using the f:form.textarea view helper.

Example:

<!-- Set required attribute -->
<f:form.textarea name="foobar" required="1" />

<!-- Set readonly attribute -->
<f:form.textarea name="foobar" readonly="1" />