Debugger: Add skeleton for a debugger adapter protocol using engine

- Support the launch of an application
- Support continue/pause an application
- Support add breakpoint only after an app is launched
(I.e. preset breakpoints won't work)
- Support stop the debug session
- "Remove one break breakpoint" works but removes all breakpoints

ToDo:
- Polish the transition between stages
- Fix breakpoints handling
- Add support "Step in", "Step out" and "Step Over"

Task-number: QTCREATORBUG-27279
Change-Id: I5c32ce713f5a0f19cc3b9d995cbbadd8adf6a413
Reviewed-by: Artem Sokolovskii <artem.sokolovskii@qt.io>
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/debugger/debuggerengine.cpp

@@ -2587,6 +2587,7 @@ bool DebuggerRunParameters::isCppDebugging() const
     return cppEngineType == GdbEngineType
         || cppEngineType == LldbEngineType
         || cppEngineType == CdbEngineType
+        || cppEngineType == DapEngineType
         || cppEngineType == UvscEngineType;
 }