Share extension (#3506)

* Setup simple share extension

* Switch the app url scheme to be the full bundle identifier

* Setup a share extension that show a SwiftUI view, uses rust tracing and redirects to the hosting aplication

* Move media as json through the custom scheme into the main app and deep link into the media upload preview screen

* Fix message forwarding and global search screen room summary provider filtering.

* Tweak the message forwarding and global search screen designs.

* Add a room selection screen to use after receiving a share request from the share extension

* Fix share extension entitlements

* Share the temporary directory between the main app and the extensions; rename the caches one.

* Remove the no longer needed notification avatar flipping fix.

* Extract the placeholder avatar image generator from the NSE

* Nest `AvatarSize` within the new `Avatars` enum

* Donate an `INSendMessageIntent` to the system every time we send a message so they appear as share suggestions

* Support suggestions in the share extension itself

* Improve sharing animations and fix presentation when room already on the stack

* Clear all routes when sharing without a preselected room.

* Fix broken unit tests

* Various initial tweaks following code review.

* Correctly clean up and dismiss the share extension for all paths.

* Move the share extension path to a constants enum

* Rename UserSessionFlowCoordinator specific share extension states and events

* Add UserSession and Room flow coordinator share route tests

* Tweak the share extension logic.

ElementX/Sources/Other/Extensions/UNNotificationContent.swift

@@ -183,37 +183,17 @@ extension UNMutableNotificationContent {
     @MainActor
     private func getPlaceholderAvatarImageData(name: String, id: String) async -> Data? {
         // The version value is used in case the design of the placeholder is updated to force a replacement
-        let shouldFlipAvatar = shouldFlipAvatar()
-        let prefix = "notification_placeholder\(shouldFlipAvatar ? "V9F" : "V9")"
+        let prefix = "notification_placeholderV9"
+        
         let fileName = "\(prefix)_\(name)_\(id).png"
         if let data = try? Data(contentsOf: URL.temporaryDirectory.appendingPathComponent(fileName)) {
             MXLog.info("Found existing notification icon placeholder")
             return data
         }
-
+        
         MXLog.info("Generating notification icon placeholder")
-        let image = PlaceholderAvatarImage(name: name,
-                                           contentID: id)
-            .clipShape(Circle())
-            .frame(width: 50, height: 50)
-        let renderer = ImageRenderer(content: image)
         
-        // Specify the scale so the image is rendered correctly. We don't have access to the screen
-        // here so a hardcoded 3.0 will have to do
-        renderer.scale = 3.0
-        
-        guard let image = renderer.uiImage else {
-            MXLog.info("Generating notification icon placeholder failed")
-            return nil
-        }
-        
-        let data: Data?
-        
-        if shouldFlipAvatar {
-            data = image.flippedVertically().pngData()
-        } else {
-            data = image.pngData()
-        }
+        let data = Avatars.generatePlaceholderAvatarImageData(name: name, id: id, size: .init(width: 50, height: 50))
         
         if let data {
             do {
@@ -224,44 +204,7 @@ extension UNMutableNotificationContent {
                 return data
             }
         }
+        
         return data
     }
-    
-    /// On simulators and macOS the image is rendered correctly
-    /// On devices before iOS 17 and iOS 17.2.0 it's rendered upside down and needs to be flipped
-    /// On all other versions it's rendered correctly and **doesn't** need to be flipped
-    private func shouldFlipAvatar() -> Bool {
-        #if targetEnvironment(simulator)
-        return false
-        #else
-        if ProcessInfo.processInfo.isiOSAppOnMac {
-            return false
-        }
-        
-        guard let version = Version(UIDevice.current.systemVersion) else {
-            return false
-        }
-        
-        if version < Version(17, 0, 0) {
-            return true
-        }
-        
-        if version == Version(17, 2, 0) {
-            return true
-        }
-        
-        return false
-        #endif
-    }
-}
-
-private extension UIImage {
-    func flippedVertically() -> UIImage {
-        let format = UIGraphicsImageRendererFormat()
-        format.scale = scale
-        return UIGraphicsImageRenderer(size: size, format: format).image { context in
-            context.cgContext.concatenate(CGAffineTransform(scaleX: 1, y: -1))
-            self.draw(at: CGPoint(x: 0, y: -size.height))
-        }
-    }
 }