Added hermes websocket support. Added chat command support. Added selectable voice command via websocket. Added websocket heartbeat management.

Chat/Commands/ChatCommand.cs

@@ -0,0 +1,27 @@
+using TwitchChatTTS.Chat.Commands.Parameters;
+using TwitchLib.Client.Models;
+
+namespace TwitchChatTTS.Chat.Commands
+{
+    public abstract class ChatCommand
+    {
+        public string Name { get; }
+        public string Description { get; }
+        public IList<ChatCommandParameter> Parameters { get => _parameters.AsReadOnly(); }
+        private IList<ChatCommandParameter> _parameters;
+
+        public ChatCommand(string name, string description) {
+            Name = name;
+            Description = description;
+            _parameters = new List<ChatCommandParameter>();
+        }
+
+        protected void AddParameter(ChatCommandParameter parameter) {
+            if (parameter != null)
+                _parameters.Add(parameter);
+        }
+
+        public abstract Task<bool> CheckPermissions(ChatMessage message, long broadcasterId);
+        public abstract Task Execute(IList<string> args, ChatMessage message, long broadcasterId);
+    }
+}