Send Intentional Mentions (#1929)

* updated sdks

* fix waveform

* implementation completed

* intentional mentions test

* removed unused var

* suggestion

ElementX/Sources/Services/Timeline/IntentionalMentions.swift

@@ -0,0 +1,41 @@
+//
+// Copyright 2023 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+import MatrixRustSDK
+import WysiwygComposer
+
+struct IntentionalMentions: Equatable {
+    let userIDs: Set<String>
+    let atRoom: Bool
+    
+    static var empty: Self {
+        IntentionalMentions(userIDs: [], atRoom: false)
+    }
+}
+
+extension IntentionalMentions {
+    func toRustMentions() -> Mentions {
+        Mentions(userIds: Array(userIDs), room: atRoom)
+    }
+}
+
+extension MentionsState {
+    func toIntentionalMentions() -> IntentionalMentions {
+        IntentionalMentions(userIDs: Set(userIds), atRoom: hasAtRoomMention)
+    }
+}