Implementing a new design and implementation for the StocQt example.
The new example uses Qt's REST API and json parser to read live stock
data.
Fixes: QTBUG-116593
Fixes: QTBUG-116594
Pick-to: 6.7
Change-Id: I2b491673bd7c9acb7812f88c508f42ad9cc9f869
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Sakaria Pouke