Change typing for after/before window/application start (#7342)

- Now the callback is provided with an object containing either
  `mainDi` or `windowDi` fields. This should help with confusion
  over which environment the `di` is for

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/features/entity-settings/showing-settings-for-correct-entity.test.tsx

@@ -24,7 +24,7 @@ describe("Showing correct entity settings", () => {
   beforeEach(async () => {
     builder = getApplicationBuilder();
 
-    builder.beforeWindowStart((windowDi) => {
+    builder.beforeWindowStart(({ windowDi }) => {
       // TODO: remove once ClusterStore can be used without overriding it
       windowDi.override(getClusterByIdInjectable, () => (clusterId) => {
         if (clusterId === cluster.id) {
@@ -35,7 +35,7 @@ describe("Showing correct entity settings", () => {
       });
     });
 
-    builder.afterWindowStart((windowDi) => {
+    builder.afterWindowStart(({ windowDi }) => {
       clusterEntity = new KubernetesCluster({
         metadata: {
           labels: {},