feat: Remove events from the OmemoManager

lib/src/omemo/ratchet_data.dart

@@ -0,0 +1,26 @@
+import 'package:omemo_dart/src/double_ratchet/double_ratchet.dart';
+
+class OmemoRatchetData {
+  const OmemoRatchetData(
+    this.jid,
+    this.id,
+    this.ratchet,
+    this.added,
+    this.replaced,
+  );
+
+  /// The JID we have the ratchet with.
+  final String jid;
+
+  /// The device id we have the ratchet with.
+  final int id;
+
+  /// The actual double ratchet to commit.
+  final OmemoDoubleRatchet ratchet;
+
+  /// Indicates whether the ratchet has just been created (true) or just modified (false).
+  final bool added;
+
+  /// Indicates whether the ratchet has been replaced (true) or not.
+  final bool replaced;
+}