Add Icons provider to QmlJS library

Add an Icons class to QmlJS along the Icons class in the C++ support.
This will be used in the QmlJS Outline.

src/libs/qmljs/qmljsicons.h

@@ -0,0 +1,28 @@
+#ifndef QMLJSICONS_H
+#define QMLJSICONS_H
+
+#include <qmljs/qmljs_global.h>
+#include <qmljs/parser/qmljsast_p.h>
+#include <QtGui/QIcon>
+
+namespace QmlJS {
+
+class IconsPrivate;
+
+class QMLJS_EXPORT Icons
+{
+public:
+    Icons();
+    ~Icons();
+
+    QIcon icon(AST::Node *node) const;
+
+    QIcon objectDefinitionIcon() const;
+    QIcon scriptBindingIcon() const;
+
+    IconsPrivate *m_d;
+};
+
+} // namespace QmlJS
+
+#endif // QMLJSICONS_H