refactor: switch strings to string references

L2BotDll/Events/EventDispatcher.h

@@ -31,7 +31,7 @@ public:
 		}
 	}
 
-	void Subscribe(std::string eventName, Delegate handler)
+	void Subscribe(const std::string& eventName, const Delegate handler)
 	{
 		m_Handlers[eventName].push_back(handler);
 	}

L2BotDll/Transports/DebugViewTransport.h

@@ -18,7 +18,7 @@ public:
 		return true;
 	}
 
-	const void Send(std::string data) override
+	const void Send(const std::string& data) override
 	{
 		OutputDebugStringA(data.c_str());
 	}

L2BotDll/Transports/NamedPipeTransport.h

@@ -37,7 +37,7 @@ public:
 		return true;
 	}
 
-	const void Send(std::string data) override
+	const void Send(const std::string& data) override
 	{
 		if (!m_Pipe.IsConnected())
 		{