ControlKit watchOS host app

This folder holds the watchOS host application (ControlKitRunnerApp.swift and Assets.xcassets) for the ControlKit-watchOS target in the shared XCRSControlKitRunner.xcodeproj.

watchOS UI testing is supported from Xcode 26 onward (the platform ships XCUIAutomation.framework). Touch input is delivered through XCUICoordinate taps; device.capabilities reports the paired-device profile (accessibility, appLifecycle, pairedDevice, screenshot), and pointer, spatial, home, and remote-button interactions are intentionally unsupported. The JSON-RPC transport and server live in ../Shared and are compiled into the ControlKit-watchOS-UITests target.