fix: raise iOS deployment target during apply

[V3RON]

Summary

• Updates voltra apply to raise React Native CLI iOS app deployment targets to Voltra's required minimum.
• Preserves compatible literal Podfile values and compatible Xcode deployment targets instead of downgrading them.
• Warns when the Podfile iOS platform is an expression Voltra cannot safely understand.

Testing

• npm run build --workspace voltra
• npm test --workspace voltra
• npm run lint --workspace voltra
• npm run typecheck --workspace voltra
• npx prettier --check .changeset/tall-maps-spark.md packages/cli/src/platforms/ios/deploymentTarget.ts packages/cli/src/platforms/ios/podfile.ts packages/cli/src/platforms/ios/xcodeTarget.ts packages/cli/src/platforms/ios/apply.ts packages/cli/test/cli.test.js
• Pre-push hook: turbo run test --affected