Refactor InstantPageUI and related modules

submodules/InstantPageUI/Sources/InstantPageNode.swift

@@ -0,0 +1,15 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+import Display
+import TelegramPresentationData
+
+protocol InstantPageNode {    
+    func updateIsVisible(_ isVisible: Bool)
+    
+    func transitionNode(media: InstantPageMedia) -> (ASDisplayNode, () -> (UIView?, UIView?))?
+    func updateHiddenMedia(media: InstantPageMedia?)
+    func update(strings: PresentationStrings, theme: InstantPageTheme)
+    
+    func updateLayout(size: CGSize, transition: ContainedViewLayoutTransition)
+}