Add option to replace attributes in customAttributes method

[savosik]

Currently, the customAttributes method merges new attributes with existing ones. While this is useful in many cases, there are scenarios where we want to completely replace an attribute rather than merge it.

Proposed change:

Add an optional parameter to the customAttributes method to allow replacing attributes instead of merging

$component->customAttributes(['class' => 'overwitting-class'], overwrite: true);

[lee-to]

use setAttribute(name, value)