QmlDesigner.ComponentsPlugin: adding .json file

Change-Id: I49c9aa68b3837fd979cf355c5585fb0ccbbac1d9
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/componentsplugin/componentsplugin.json

+{
+
+
+"Vendor" : "Digia Plc",
+
+
+
+
+"Category" : "Qt Quick",
+
+
+"Description" : "Plugin for Qt Quick Component Items.",
+
+
+"Url" : "http://www.qt-project.org"
+
+
+
+}