simplex-chat server & JavaScript/TypeScript SDK/client (#539)

* simplex-chat server

* typescript types for chat commands and command serialization

* typescript ChatResponse type

* more types

* more types

* websocket chat client

* aligb ts/haskell types

* chat server & TS client via websockets - it works

* TS chat client test

* TS chat client test

* update test

* more api functions

* more api methods, refactor, readme

* squaring chat bot example, fixes

* update readme

* remove console.log

* npm version 0.1.0

simplex-chat.cabal

@@ -160,6 +160,7 @@ executable simplex-bot-advanced
 executable simplex-chat
   main-is: Main.hs
   other-modules:
+      Server
       Paths_simplex_chat
   hs-source-dirs:
       apps/simplex-chat
@@ -180,6 +181,7 @@ executable simplex-chat
     , exceptions ==0.10.*
     , filepath ==1.4.*
     , mtl ==2.2.*
+    , network ==3.1.*
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , simple-logger ==0.1.*
@@ -192,6 +194,7 @@ executable simplex-chat
     , time ==1.9.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
+    , websockets ==0.12.*
   default-language: Haskell2010
 
 test-suite simplex-chat-test