Expo Better Auth Passkey Integration

The `expo-better-auth-passkey` package provides native passkey (WebAuthn) support for applications built with Expo and `better-auth`. It acts as a drop-in replacement for `better-auth`'s standard `passkeyClient`, leveraging platform-specific APIs like Apple's `ASAuthorizationController` for iOS/macOS and Android's Credential Manager. This ensures a consistent passkey experience across web, iOS, and Android using a single codebase. The library, currently at version 1.4.1, maintains an active release schedule with updates addressing bug fixes and new features. Key differentiators include its seamless integration into both managed and bare Expo projects without requiring ejecting, a smart fallback to the web client for web builds, and a TypeScript-first approach with strict type mirroring for robust development.