Introduces native bindings for React Native, including Swift-based Metal renderer for iOS (TwoMetalView, TwoRenderer, TwoViewManager), TypeScript bridge components (lib/native.ts, Provider), and supporting types. Updates package configuration and build to support native exports, adds documentation for native integration, and updates dependencies for React Native and Two.js.

Updated ref callbacks to use explicit if statements for setting refs in LinearGradient and Texture components, improving readability and consistency.

Introduces a Metal shader (Shaders.metal) and updates TwoRenderer.swift to render Two.js scene graphs using Metal. TwoMetalView.swift now passes draw commands to the renderer. The React Native Provider implementation is enhanced to serialize the Two.js scene graph and send it to the native side, with improved type safety and event shape registration. Minor fixes in Provider.tsx improve child validation.

Added TwoViewManager.m for React Native integration and updated Package.swift to include new source files. Enhanced TwoRenderer.swift to support hierarchical 2D transforms (translation, rotation, scale) and hex color parsing for shapes.

iOS renderer: introduce DrawCall and drawCalls array, replace parseShape with parseNode to handle groups, transforms, fills (fan triangulation), strokes (lineStrip), and per-shape opacity; expand parseHexColor to support 3-digit hex and opacity; use drawCalls to issue Metal drawPrimitives instead of a single draw. JS provider: replace serializeScene with recursive serializeNode, include more shape properties (cap, join, miter, closed, curved, automatic, beginning, ending, linewidth), serialize vertex control points, and serialize specific shape attributes (radius, width, height) to provide richer data for the native renderer.