Add read all messages feature (#7049)

* Add read all messages feature: read all messages using Client.markAllRoomsAsRead() method

* Move the 'mark all rooms as read' footer as part of the list item

* Replace `showMarkAllRoomsAsReadConfirmation` and its associated event with `MarkAllRoomsAsRead(val needsConfirmation: Boolean)` and a `AsyncAction.Confirming` state

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Co-authored-by: Jorge Martín <jorgem@element.io>

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/FakeMatrixClient.kt

@@ -117,6 +117,7 @@ class FakeMatrixClient(
     private val getRecentEmojisLambda: () -> Result<List<String>> = { Result.success(emptyList()) },
     private val addRecentEmojiLambda: (String) -> Result<Unit> = { Result.success(Unit) },
     private val markRoomAsFullyReadResult: (RoomId, EventId) -> Result<Unit> = { _, _ -> lambdaError() },
+    private val markAllRoomsAsReadResult: () -> Result<Unit> = { Result.success(Unit) },
     private val performDatabaseVacuumLambda: () -> Result<Unit> = { lambdaError() },
     private val getMapStyleUrlResult: () -> Result<String?> = { lambdaError() },
     private val getDatabaseSizesLambda: () -> Result<SdkStoreSizes> = { lambdaError() },
@@ -373,6 +374,10 @@ class FakeMatrixClient(
         return markRoomAsFullyReadResult(roomId, eventId)
     }
 
+    override suspend fun markAllRoomsAsRead(): Result<Unit> {
+        return markAllRoomsAsReadResult()
+    }
+
     override suspend fun performDatabaseVacuum(): Result<Unit> {
         return performDatabaseVacuumLambda()
     }