refactor(rn): bump expo SDK to 54

[simeng-li]

Summary

• Bump Expo SDK support in @logto/rn to include SDK 54~.
• Update the rn-sample using Expo SDK 54 with matching dependencies.
• Widen @logto/rn SDK peer dependency ranges to cover Expo SDK 52~ and 54~ while pinning dev deps accordingly.

Testing

test locally on ios simulator

Checklist

• .changeset
• unit tests
• integration tests
• necessary TSDoc comments

[Copilot]

Pull request overview

Updates the React Native (Expo) SDK and sample app to support Expo SDK 54 while broadening @logto/rn compatibility across Expo SDK 52–54.

Changes:

• Bumped @logto/rn version and widened peer dependency range for async storage.
• Updated rn-sample dependencies to Expo SDK 54 / React 19 / RN 0.81.
• Adjusted Expo app config and removed the custom Metro config from the sample.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

File	Description
packages/rn/package.json	Bumps package version, updates dev deps (RN/Expo modules), and broadens peer dependency range for async-storage.
packages/rn-sample/package.json	Moves the sample app to Expo SDK 54 + updated React/RN ecosystem versions.
packages/rn-sample/metro.config.js	Removes the monorepo Metro override in favor of default Expo/Metro behavior.
packages/rn-sample/app.json	Adds Expo plugins and reformats config values for SDK 54 setup.

Comments suppressed due to low confidence (1)

packages/rn/package.json:67

• @logto/rn imports from react (hooks/components) but doesn’t declare react in peerDependencies. Declaring an explicit react peer range (aligned with the supported Expo SDKs / React versions) makes the package’s runtime requirement clear and helps package managers validate consumer installs.

    "@react-native-async-storage/async-storage": ">=1.23.1 <3",
    "expo-crypto": ">=14.0.2 <16",
    "expo-secure-store": ">=14.0.1 <16",
    "expo-web-browser": ">=14.0.2 <16",
    "react-native": ">=0.76.0 <1"

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