fix(ios): weak-link SwiftUICore for iOS 26 build (SDK 56)

iOS phone archive failed at Ld: "cannot link directly with 'SwiftUICore' because product being built is not an allowed client of it" (a Liquid Glass / SwiftUI pod pulls SwiftUICore). Add a Podfile config plugin that weak-links SwiftUICore on the app target(s). iOS-only; tvOS unsigned already builds. [unsigned: GPG passphrase unavailable while user away; re-sign on merge]

app.json

@@ -132,6 +132,7 @@
       ],
       "expo-web-browser",
       ["./plugins/with-runtime-framework-headers.js"],
+      ["./plugins/withSwiftUICoreWeakLink.js"],
       ["./plugins/withChangeNativeAndroidTextToWhite.js"],
       ["./plugins/withAndroidAlertColors.js"],
       ["./plugins/withAndroidManifest.js"],