fix: add initial param for actions from deep link

packages/core/src/__tests__/getActionFromState.test.tsx

@@ -35,8 +35,10 @@ it('gets navigate action from state', () => {
             author: 'jane',
           },
           screen: 'qux',
+          initial: true,
         },
         screen: 'bar',
+        initial: true,
       },
     },
     type: 'NAVIGATE',
@@ -70,9 +72,11 @@ it('gets navigate action from state', () => {
     payload: {
       name: 'foo',
       params: {
+        initial: true,
         screen: 'bar',
         params: {
           screen: 'quz',
+          initial: false,
         },
       },
     },

packages/core/src/getActionFromState.tsx

@@ -3,6 +3,7 @@ import { PartialState, NavigationState } from '@react-navigation/routers';
 type NavigateParams = {
   screen?: string;
   params?: NavigateParams;
+  initial?: boolean;
 };
 
 type NavigateAction = {
@@ -35,6 +36,7 @@ export default function getActionFromState(
     }
 
     route = current.routes[current.routes.length - 1];
+    params.initial = current.routes.length === 1;
     params.screen = route.name;
 
     if (route.state) {