core: group message forwarding (#3360)

* core: group message forwarding types

* xgrpmemcon

* rework xgrpmemcon to use intros table

* only forward w/t error

* forward msg

* xGrpMsgForward, check integrity outside

* deduplicate group messages

* test

* change error

* item forwarded flag

* intro_chat_protocol_version, bump version

* comment

* highly available client option

* more comments

* notify xgrpmemcon on deduplication

* member vrange

* encoding

* remove MsgForward

* remove import

* exclude files from forwarding

* refactor

* rename to align with protocol

* forward more message types

* add events

* remove unused error, function

* add x.file.cancel, x.info and x.grp.mem.new to forwarded messages

* remove unused x.msg.file.cancel

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

src/Simplex/Chat/Controller.hs

@@ -126,7 +126,8 @@ data ChatConfig = ChatConfig
     cleanupManagerInterval :: NominalDiffTime,
     cleanupManagerStepDelay :: Int64,
     ciExpirationInterval :: Int64, -- microseconds
-    coreApi :: Bool
+    coreApi :: Bool,
+    highlyAvailable :: Bool
   }
 
 data DefaultAgentServers = DefaultAgentServers