[iOS][macOS] Invoke dev menu methods by rndebugger

[jhen0409]

The React Native for iOS have NativeModules.DevMenu, so we can invoke following methods on the worker:

• Reload JS
• Enable LiveReload
• Enable Hot Reload
• Enable Profiling
• Show Dev menu

I think it will be helpful to enhance the development experience, even we can support MacBook Touch Bar in the future.

Or we can invoke directly in RNDebuggerWorker.js context for console:

global.require('NativeModules').DevMenu.reload();

Others

• (Not iOS only, [FEATURE] Debug network requests #15) Enable XHR Inspect

Roadmap

• Check methods available by worker message
• Add methods to menu or context menu, invoke by worker message
• Touch Bar support for macOS (Upstream: Support MacBook Touch Bar API electron/electron#7781)