core chat groups protocol for adding members (#78)

* add category and local display name to group members, extend member status

* additional chat commands, serialization

* parse all chat messages

* draft group protocol implementation

* group protocol: connect new member to existing members (TODO fix race condition with contact connection)

* send/receive group messages (race condition still there - the 3rd member cannot send either group or direct messages to the 2nd member - CONN SIMPLEX)

* send x.grp.mem.info and x.ok in SMP confirmation

* fix host user adding new member, update simplexmq to fix sqlite concurrency, remove logs, make # optional in chat commands

* more precise view messages about members joining and connecting

* track connection status; only send messages to active members (TODO change to current members); group name autocomplete after joining the group

* track via which group the contact was added; show only one message when a contact fully connected; group tests

* test sending messages to the new direct contacts created via the group

* update simplexmq to include .cabal file

* remove unused import

src/Simplex/Chat/Input.hs

@@ -81,7 +81,7 @@ updateTermState ac tw (key, ms) ts@TerminalState {inputString = s, inputPosition
     contactPrefix = case ac of
       ActiveNone -> ""
       ActiveC c -> "@" <> T.unpack c <> " "
-    -- ActiveG (Group g) -> "#" <> B.unpack g <> " "
+      ActiveG g -> "#" <> T.unpack g <> " "
     backDeleteChar
       | p == 0 || null s = ts
       | p >= length s = ts' (init s, length s - 1)