core: switch connection (#1277)

* core: switch connection

* chat items for SWITCH

* additional events for connection switch

* update simplexmq

* test

* comment test output

* update messages for connection switch

Co-authored-by: JRoberts <8711996+jr-simplex@users.noreply.github.com>

src/Simplex/Chat/Util.hs

@@ -1,10 +0,0 @@
-module Simplex.Chat.Util where
-
-import Data.ByteString.Char8 (ByteString)
-import Data.Text (Text)
-import Data.Text.Encoding (decodeUtf8With)
-
-safeDecodeUtf8 :: ByteString -> Text
-safeDecodeUtf8 = decodeUtf8With onError
-  where
-    onError _ _ = Just '?'