Add Buff infrastructure to go through different logic paths from different patches (#5073)

common/patches/client_version.h

@@ -1,13 +1,38 @@
-//
-// Created by dannu on 4/21/2026.
-//
+/*	EQEmu: EQEmulator
+
+	Copyright (C) 2001-2026 EQEmu Development Team
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
 
 #pragma once
 
 #include "common/emu_versions.h"
 #include <memory>
 
-namespace Message { class IMessage; }
+namespace ClientPatch {
+class IBuff;
+class IMessage;
+}
 
+// store all static functions for the different patches here
 // store all static functions for the different patches here, this can return nullptr for unsupported patches
-const std::unique_ptr<Message::IMessage>& GetMessageComponent(EQ::versions::ClientVersion version);
+template <typename Component>
+const std::unique_ptr<Component>& GetComponent(EQ::versions::ClientVersion version);
+
+template <>
+const std::unique_ptr<ClientPatch::IBuff>& GetComponent(EQ::versions::ClientVersion version);
+
+template <>
+const std::unique_ptr<ClientPatch::IMessage>& GetComponent(EQ::versions::ClientVersion version);