Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/46770
Small updates to the `react-native start` command CLI output:
- Change "Welcome..." text to blue.
- Display server base URL instead of port only.
- Embolden key command letters.
- "Ctrl+C to exit" prompt.
- Extra newlines for balance.
Changelog: [Internal]
Reviewed By: cortinico, cipolleschi
Differential Revision: D63328267
fbshipit-source-id: 119ddb2ba68c99df532840285c3c1f922e727e8b