Add OMV Enum communication types

lib/omv/enums.dart

@@ -0,0 +1,20 @@
+enum CommunicationType {
+  /// Whispers can be heard up to 10m away
+  Whisper,
+
+  /// Normal chat can be heard up to 20m away
+  Say,
+
+  /// Shouts can be heard up to 100m away
+  Shout,
+
+  /// Indicates the message can only be heard by the object owner within the same simulator
+  OwnerSay,
+
+  /// The message can be heard anywhere within the same simulator
+  /// Channel 0 is restricted and cannot be used to broadcast
+  RegionSay,
+
+  /// The message can be heard anywhere within the same simulator by the designated recipient.
+  RegionSayTo
+}