[Message Actions] Retry sending failed messages (#596)

* Add `RetrySendMessageMenu` to retry sending failed messages or removing its local echo.

* Fix initial event being retrieved, not the updated one

---------

Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/MatrixRoom.kt

@@ -83,6 +83,10 @@ interface MatrixRoom : Closeable {
 
     suspend fun sendReaction(emoji: String, eventId: EventId): Result<Unit>
 
+    suspend fun retrySendMessage(transactionId: String): Result<Unit>
+
+    suspend fun cancelSend(transactionId: String): Result<Unit>
+
     suspend fun leave(): Result<Unit>
 
     suspend fun acceptInvitation(): Result<Unit>

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/MatrixTimelineItem.kt

@@ -24,6 +24,7 @@ sealed interface MatrixTimelineItem {
     data class Event(val event: EventTimelineItem) : MatrixTimelineItem {
         val uniqueId: String = event.uniqueIdentifier
         val eventId: EventId? = event.eventId
+        val transactionId: String? = event.transactionId
     }
 
     data class Virtual(val virtual: VirtualTimelineItem) : MatrixTimelineItem

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/item/event/EventTimelineItem.kt

@@ -23,6 +23,7 @@ import io.element.android.libraries.matrix.api.timeline.item.TimelineItemDebugIn
 data class EventTimelineItem(
     val uniqueIdentifier: String,
     val eventId: EventId?,
+    val transactionId: String?,
     val isEditable: Boolean,
     val isLocal: Boolean,
     val isOwn: Boolean,