Host detection

Function	Returns	Notes
getSDK()	CatholicMiniAppSDK | null	null outside the app.
requireSDK()	CatholicMiniAppSDK	Throws outside the app. For code paths that need the host.
isInApp()	boolean	true inside the i-Catholic WebView.
hasBridgeMethod(name)	boolean	Does this app version have the method? See Feature detection.