chore: first liveview route

lib/slax_web/live/chat_room_live.ex

@@ -0,0 +1,10 @@
+defmodule SlaxWeb.ChatRoomLive do
+  @moduledoc false
+  use SlaxWeb, :live_view
+
+  def render(assigns) do
+    ~H"""
+    <div>Welcome to the chat!</div>
+    """
+  end
+end