Add tasks for all the new languages

Task/Chat-server/Nim/chat-server.nim

@@ -0,0 +1,40 @@
+import asyncnet, asyncdispatch
+
+type TClient = tuple[socket: AsyncSocket, name: string]
+var clients: seq[Client] = @[]
+
+proc sendOthers(client: Client, line: string) {.async.} =
+  for c in clients:
+    if c != client:
+      await c.socket.send(line & "\c\L")
+
+proc processClient(socket: AsyncSocket) {.async.} =
+  await socket.send("Please enter your name: ")
+  let client: Client = (socket, await socket.recvLine())
+
+  clients.add client
+  discard client.sendOthers "+++ " & client.name & " arrived +++"
+
+  while true:
+    let line = await client.socket.recvLine()
+    if line == "":
+      discard client.sendOthers "--- " & client.name & " leaves ---"
+      break
+    discard client.sendOthers client.name & "> " & line
+
+  for i,c in clients:
+    if c == client:
+      clients.del i
+      break
+
+proc serve() {.async.} =
+  var server = newAsyncSocket()
+  server.bindAddr(Port(4004))
+  server.listen()
+
+  while true:
+    let socket = await server.accept()
+    discard processClient socket
+
+discard serve()
+runForever()