Spike: Creating a QML language test suite

Creating a language specification is one important aspect to align multiple implementations of QML. In addition to this, a test suite needs to be created which each implementation can be run against.

With this research story we need to identify the various aspects such a test suite should cover; also how multiple implementations can run against it.

Some ground work exists in terms of QML unit tests from the Qt declarative repos. However, those might be hardcoded against the Qt implementation and not be a out-of-the-box solution for UL.