fix(init): install Cocoapods with New Architecture enabled by default

[szymonrybczak]

Summary:

New Architecture was enabled by default for React Native 0.76, so inside init we should install Cocoapods with New Architecture enabled by default.

Test Plan:

1. Clone the repository and do all the required steps from the Contributing guide
2. Run node ~/path/to/cli/packages/cli/build/bin.js init
3. Press y when the prompts ask whether to install Cocoapods
4. "Installing CocoaPods dependencies with New Architecture" log should be visible

Checklist

• [x] Documentation is up to date to reflect these changes.
• [x] Follows commit message convention described in CONTRIBUTING.md