feat: add support acp in common chat (#369)

sources/acp/AgentKnowledgeService.hpp

@@ -0,0 +1,21 @@
+// Copyright (C) 2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <QString>
+
+namespace QodeAssist::Acp {
+
+class AgentKnowledgeService
+{
+public:
+    virtual ~AgentKnowledgeService() = default;
+
+    virtual QString start() = 0;
+    virtual void stop() = 0;
+    virtual QString serverName() const = 0;
+};
+
+} // namespace QodeAssist::Acp