feat(ui): refactor image deletion

Add `DeleteImageContext`:
- provide a single function to delete an image
- opens the modal or immediately deletes, if confirm is off

invokeai/frontend/web/src/features/parameters/components/Parameters/ImageToImage/InitialImagePreview.tsx

@@ -14,6 +14,7 @@ import { useAppToaster } from 'app/components/Toaster';
 import IAIDndImage from 'common/components/IAIDndImage';
 import { ImageDTO } from 'services/api';
 import { IAIImageFallback } from 'common/components/IAIImageFallback';
+import { useGetIsImageInUse } from 'common/hooks/useGetIsImageInUse';
 
 const selector = createSelector(
   [generationSelector],