Debugger: Export BreakpointManager and some icons

Allow retrieving of breakpoint information without
the need to create a debugger engine.
Export some icons for re-use.

Change-Id: Ic3d5f22840c1b67e8b3e4e0892c204da3ab1af9e
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/debugger/breakhandler.h

@@ -26,6 +26,7 @@
 #pragma once
 
 #include "breakpoint.h"
+#include "debugger_global.h"
 #include "debuggerprotocol.h"
 
 #include <utils/filepath.h>
@@ -281,7 +282,7 @@ private:
     DebuggerEngine * const m_engine;
 };
 
-class BreakpointManager : public BreakpointManagerModel
+class DEBUGGER_EXPORT BreakpointManager : public BreakpointManagerModel
 {
 public:
     BreakpointManager();