Top level deeplink handling (#1660)

* Handle link opening on the top most levels and prepare for percolating them throughout the app
* Add support for a custom app scheme
* Add specific AppRoute parsers.
* Integrate custom scheme in the AppRouteURLParser
* Switch to `element://call` and cleanup route parsing

ElementX/SupportingFiles/target.yml

@@ -54,6 +54,15 @@ targets:
         CFBundleDisplayName: $(APP_DISPLAY_NAME)
         CFBundleShortVersionString: $(MARKETING_VERSION)
         CFBundleVersion: $(CURRENT_PROJECT_VERSION)
+        CFBundleURLTypes: [
+          {
+            CFBundleTypeRole: Editor,
+            CFBundleURLName: $(BASE_BUNDLE_IDENTIFIER),
+            CFBundleURLSchemes: [
+              $(APP_CUSTOM_SCHEME)
+            ]
+          }
+        ]
         UISupportedInterfaceOrientations: [
           UIInterfaceOrientationPortrait,
           UIInterfaceOrientationPortraitUpsideDown,