[Message Actions] Display debug info for events in the timeline (#555)

* Display debug info for events in the timeline on debug builds.

---------

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

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

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 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.
+ */
+
+package io.element.android.libraries.matrix.api.timeline.item
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+data class TimelineItemDebugInfo(
+    val model: String,
+    val originalJson: String?,
+    val latestEditedJson: String?,
+) : Parcelable

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

@@ -18,6 +18,7 @@ package io.element.android.libraries.matrix.api.timeline.item.event
 
 import io.element.android.libraries.matrix.api.core.EventId
 import io.element.android.libraries.matrix.api.core.UserId
+import io.element.android.libraries.matrix.api.timeline.item.TimelineItemDebugInfo
 
 data class EventTimelineItem(
     val uniqueIdentifier: String,
@@ -31,7 +32,8 @@ data class EventTimelineItem(
     val sender: UserId,
     val senderProfile: ProfileTimelineDetails,
     val timestamp: Long,
-    val content: EventContent
+    val content: EventContent,
+    val debugInfo: TimelineItemDebugInfo,
 ) {
     fun inReplyTo(): InReplyTo? {
         return (content as? MessageContent)?.inReplyTo