fix: render visual tiles on search result pages with category match

[ahuininga-orisha]

When Tweakwise returns a Visual tile in search results (e.g. when a search query triggers a category match), the Visual was not shown. This adds the Hyva template override for the Visual block on the search result page, consistent with how hyva_catalog_category_view.xml handles it for category pages.

• src/view/frontend/layout/hyva_catalogsearch_result_index.xml — added <referenceBlock> to override tweakwise.catalog.product.list.visual template to Tweakwise_TweakwiseHyva::product/list/visual.phtml. The Hyva AJAX search layout (hyva_tweakwise_ajax_search.xml) inherits this automatically via <update handle="hyva_catalogsearch_result_index"/>.
• Main module PR: fix: render visual tiles on search result pages with category match Magento2Tweakwise#390

How to test

Scenario 1 — Visual renders on Hyva search page with category match

1. On a Hyva storefront, perform a search query that triggers a category match (e.g. bags).
2. Expected: The Visual tile renders correctly using the Hyva visual template at the correct grid position.

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Scenario 2 — Category page Visuals still render on Hyva

1. Navigate to a category page with a Visual configured in its builder.
2. Expected: Visual tile renders correctly — unchanged behaviour.

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Scenario 3 — AJAX filtering on Hyva search preserves Visual

1. On the Hyva search result page from scenario 1, apply a facet filter via AJAX.
2. Expected: The Visual tile remains at the correct position after filtering.

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