Move timeline drag and drop handling to the recently introduced TimelineView.

ElementX/Sources/Screens/Timeline/View/TimelineView.swift

@@ -10,6 +10,7 @@ import WysiwygComposer
 
 struct TimelineView: View {
     @ObservedObject var timelineContext: TimelineViewModel.Context
+    @State private var dragOver = false
     
     var body: some View {
         TimelineViewRepresentable()
@@ -51,6 +52,15 @@ struct TimelineView: View {
                 ReadReceiptsSummaryView(orderedReadReceipts: $0.orderedReceipts)
                     .environmentObject(timelineContext)
             }
+            .onDrop(of: ["public.item", "public.file-url"], isTargeted: $dragOver) { providers -> Bool in
+                guard let provider = providers.first,
+                      provider.isSupportedForPasteOrDrop else {
+                    return false
+                }
+                
+                timelineContext.send(viewAction: .handlePasteOrDrop(provider: provider))
+                return true
+            }
     }
 }