[Chore] Expo 55 upgrade

[joaguirrem]

🔄 Type of change:

• ✨Feature/chore
• ♻️ Refactor
• 🔧 Bugfixes

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✏️ Description:

• Expo 55 upgrade: Updates the example app to Expo SDK 55, including updated app.json config, new icon assets (adaptive icons for Android, .expo.icon format for iOS), and refreshed splash screen theming.
• Web implementation fixes:
  • Store expiresAt (absolute timestamp) in session instead of expiresIn (relative seconds), so getAccessToken() returns correct remaining TTL after session is restored from sessionStorage.
  • Wrap logout() token revocation in a try/catch so session is always cleared even if the revoke request fails.
  • Default redirectUri is now window.location.origin (not window.location.origin/login).
• iOS fix: Use .compactMap for scopes to drop unrecognized values, and use typed .aggressive/.normal enum cases for botPromptStyle.
• Crypto refactor: Extract shared bytesToBase64Url helper to deduplicate base64url encoding logic in randomBase64Url and sha256Base64Url.
• Docs fix: Correct VerifyResult table — field is channelId, not clientId.
• Dev dependencies: Bump eslint, @typescript-eslint/parser, typescript-eslint, and eslint-plugin-simple-key-sort to latest patch versions.