feat: upgrade CES templates to Expo SDK 57

[DavidJGrimsley]

Summary

• upgrade generated CES templates to Expo SDK 57 / React Native 0.86
• align Expo-managed package ranges with SDK 57, including Expo Router 57 and the updated Software Mansion stack
• remove generated newArchEnabled config and update the printed prebuild guidance for SDK 57 behavior

Verification

• bun run build:cli
• bun run snapshot-update
• bun run test
• generated a Bun + NativeWindUI app and verified expo install --check, expo-doctor, and tsc --noEmit
• generated an npm + React Navigation + Unistyles app and verified expo install --check, expo-doctor, and tsc --noEmit

[Copilot]

Pull request overview

This PR upgrades the generated Create Expo Stack (CES) templates (and the CLI’s own Expo dependency) to align with Expo SDK 57 / React Native 0.86, including updating Expo-managed package ranges, removing now-redundant New Architecture config, and adjusting prebuild guidance to match SDK 57 behavior.

Changes:

• Bump Expo dependency versions to SDK 57 across the repo and CLI.
• Update generated template dependencies to SDK 57-compatible Expo + Software Mansion versions (incl. Expo Router 57).
• Remove generated newArchEnabled config and update printed prebuild instructions for SDK 57’s default clean behavior.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Bumps repo-level Expo dependency to ~57.0.4.
cli/package.json	Bumps CLI’s Expo dependency to ^57.0.4.
cli/src/utilities/printOutput.ts	Updates printed prebuild guidance for SDK 57.
cli/src/templates/base/package.json.ejs	Updates generated template dependency versions to SDK 57 / RN 0.86 ranges.
cli/src/templates/base/app.json.ejs	Removes generated newArchEnabled config from template output.
.changeset/expo-sdk-57-upgrade.md	Adds a changeset documenting the SDK 57 upgrade and related template/CLI changes.

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