Function switchStyling

Switches the visual styling and shader logic of all stylable/vegetation 3D layers in the viewer.

• Updates all stylable and vegetation layers with a Cesium3DTileStyle that accounts for hidden features/entities (using Variables.hideIDs and updateStylingWithDeletionList).
• Swaps between texture (realistic/photoreal/colored) and schematic (white/green) custom shaders depending on the 'texture' query parameter in the URL manager.
• Ensures both the layerCollection and the styleManager reflect the currently applied style.
• If a non-default style is selected, applies it and updates with the hidden ID filtering.