feat: export CactusImage to make it available for consumers

[aryaminus]

Summary

• Export CactusImage from src/index.tsx.

Motivation

CactusImage was previously internal or not exposed via the main entry point. Exporting it allows the example app and other consumers of the library to import and use CactusImage directly.

[Copilot]

Pull request overview

This PR exports the CactusImage class from the library's main entry point (src/index.tsx), making it publicly available for consumers. Previously, CactusImage was only exported from the internal src/native/ module but not exposed through the top-level API.

Key Changes:

• Added export statement for CactusImage from ./native/CactusImage in the main index file

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[Copilot]

The CactusImage export is placed under the "// Classes" comment, but it's actually a native module from the ./native/ directory. This should either be moved to a "// Native" section (similar to how there are separate sections for Classes, Hooks, Types, and Config) or placed under a more generic section name. This helps maintain clear organization of different module types in the public API.