Script generator: consider bluesky queueserver as replacement backend

As a developer I would like to consider if:

1) we can use bluesky's [`queueserver`](https://blueskyproject.io/bluesky-queueserver/) as a backend for the script generator
2) we can ditch the GUI script generator entirely in favour of either [HZB's standalone application](https://codebase.helmholtz.cloud/hzb/bluesky/qt_gui/source/bluesky-emil-gui/-/tree/v1.0.3?ref_type=tags) or phoebus' (currently in active development) queueserver front end.