feat(expo): add Android bottom sheet presentation

[swolfand]

Description

Adds an opt-in Android presentation mode to the Expo native AuthView:

<AuthView presentation="bottomSheet" />

AuthView continues to render inline by default, so existing full-screen and embedded usages are unchanged. When bottomSheet is selected on Android, the Expo native host presents Clerk's existing Compose auth flow in a Material 3 bottom sheet, uses the Clerk theme background, keeps Clerk branding visible in the partially expanded state, and supports expansion and dismissal.

Previously, the Expo bridge always mounted the Android auth view as full-parent content. React Native callers could place that content inside a modal, but could not opt into a native Material bottom-sheet presentation without modifying the bridge locally.

Validation:

• pnpm turbo build --filter=@clerk/expo
• pnpm turbo test --filter=@clerk/expo (107 tests)
• pnpm --filter @clerk/expo lint (no errors; existing warnings only)
• pnpm --filter @clerk/expo format:check
• Android release and debug builds in an Expo SDK 57 consumer app
• Manual verification on an Android emulator and Pixel 9 Pro

[changeset-bot]

🦋 Changeset detected

Latest commit: 61e5663

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@clerk/expo	Minor

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Jul 22, 2026 7:17pm
swingset	Ready	Preview, Comment	Jul 22, 2026 7:17pm

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commit: 61e5663