[EVOL] Allow add custom attributes in shop list (With DI)

[Coosos]

Hi,

I propose an evolution to add custom seller attributes in the store search page.
For added more attributes, just add attribute list with a di.xml

Example:

<type name="Smile\StoreLocator\Block\Search">
    <arguments>
        <argument name="additionalAttributesToSelect" xsi:type="array">
            <item name="has_drive" xsi:type="string">has_drive</item>
        </argument>
    </arguments>
</type>