feat: Handle links to OS store's subscriptions

The app cannot unsubscribe a plan by itself. The only thing we can do
it to redirect the user to the OS Store's subscriptions page

The Cloudery is expected to do this when the user clicks on the
"Manage plan" button, then the app will intercept the corresponding
link and open the OS page

src/app/domain/iap/services/clouderyOffer.ts

@@ -59,6 +59,11 @@ export const interceptNavigation =
   (request: WebViewNavigation): boolean => {
     log.debug('Navigating to', request.url)
     try {
+      if (isOsStoreUrl(request.url)) {
+        void Linking.openURL(request.url)
+        return false
+      }
+
       if (isStartIapUrl(request.url)) {
         const url = new URL(request.url)
         const productId = url.searchParams.get('productId') ?? 'test_comfort'
@@ -94,6 +99,13 @@ const isStartIapUrl = (url: string): boolean => {
   return url.startsWith(START_IAP_URL)
 }
 
+const isOsStoreUrl = (url: string): boolean => {
+  return (
+    url.startsWith('https://apps.apple.com/account/subscriptions') ||
+    url.startsWith('https://play.google.com/store/account/subscriptions')
+  )
+}
+
 const buySubscription = async (
   itemId: string,
   instanceInfo: InstanceInfo,