Add ReceiptType

Signed-off-by: Šimon Brandner <[email protected]>

src/@types/read_receipts.ts

@@ -0,0 +1,21 @@
+/*
+Copyright 2022 Šimon Brandner <[email protected]>
+
+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.
+*/
+
+export enum ReceiptType {
+    Read = "m.read",
+    FullyRead = "m.fully_read",
+    ReadPrivate = "org.matrix.msc2285.read.private"
+}