Reaction summary and flow layout for reactions (#1158)

* Add reaction summary view

* Add avatars and display names and flowlayout for reactions

- Add avatars to summary view
- Add display names to summary view
- Add flow layout to reaction buttons as per designs(long press on  scolling buttons is difficult to achieve so prioritised this).

* Add and use SwiftUI-Flow for reaction layout.

* Correct Swift-Flow inclusion via xcodegen

* Remove own FlowLayout implementation and Fix unit tests

* Improve naming and correct spacing on summary view as per design.

* Fix safe area insets on summary view bottom sheet

* Scroll to selected reaction in the case that it is offscreen when the sheet is displayed.

* Add more reactions to UITests to ensure the new flow layout is displayed(wraps on to second line).

* Fix snapshot image.

* Address review comments.

* Use onLongPressGesture for reactions also to fix double actions bug and for consistency.

* Respect RTL languages.

* Fix unit test.

ElementX/Sources/Services/Timeline/TimelineItemContent/AggregratedReaction.swift

@@ -18,10 +18,22 @@ import Foundation
 
 /// Represents all reactions of the same type for a single event.
 struct AggregatedReaction: Hashable {
+    /// The id of the account owner
+    let accountOwnerID: String
     /// The reaction that was sent.
     let key: String
-    /// The number of times this reactions was sent.
-    let count: Int
-    /// Whether to highlight the reaction, indicating that the current user sent this reaction.
-    let isHighlighted: Bool
+    /// The user ids of those who sent the reactions
+    let senders: [String]
+}
+
+extension AggregatedReaction {
+    /// The number of times this reactions was sent.
+    var count: Int {
+        senders.count
+    }
+    
+    /// Whether to highlight the reaction, indicating that the current user sent this reaction.
+    var isHighlighted: Bool {
+        senders.contains(where: { $0 == accountOwnerID })
+    }
 }