Add materials prop to ARPlaneSelector for plane customization

[mrankkiiiii]

Summary

This PR adds a new materials prop to ViroARPlaneSelector, allowing developers to customize the material applied to detected planes.

Motivation

Previously, the plane material was fixed and could not be customized. This change improves flexibility and enables better visual customization for AR experiences.

Changes

• Added materials prop to `ViroARPlaneSelector
• Passed the materials to the underlying plane component
• Maintains backward compatibility with existing usage

Usage Example

<ViroARPlaneSelector materials="customPlaneMaterial">
  {children}
</ViroARPlaneSelector>