Debugger: Add documentation to QmlAdapter

Change-Id: I6a8a4e0e220cde51fa16c33b9fa468b41521d88f
Reviewed-by: Aurindam Jana <aurindam.jana@nokia.com>

src/plugins/debugger/qml/qmladapter.cpp

@@ -47,6 +47,10 @@ using namespace QmlDebug;
 namespace Debugger {
 namespace Internal {
 
+/*!
+ QmlAdapter manages the connection & clients for QML/JS debugging.
+ */
+
 QmlAdapter::QmlAdapter(DebuggerEngine *engine, QObject *parent)
     : QObject(parent)
     , m_engine(engine)