Move QmlConsole to Debugger

Now it is closer to its only user and possibly reusable for no-QML uses
there.  We also drop the QML/JS syntax checker. The application being
debugged can already tell us about syntax errors. There is no need to
duplicate that functionality.

Change-Id: I2ba151f9f4c854c6119ba5462c21be40bddcebf9
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/debugger/debuggerengine.h

@@ -263,6 +263,7 @@ public:
 
     virtual bool acceptsDebuggerCommands() const { return true; }
     virtual void executeDebuggerCommand(const QString &command, DebuggerLanguages languages);
+    virtual bool evaluateScript(const QString &expression);
 
     virtual void assignValueInDebugger(WatchItem *item,
         const QString &expr, const QVariant &value);