consider moving metadata ie. TITLE, USERS to a soft ioc

this decouples the control code so if we wanted to "plug" something else in instead of the current kdaectrl we can do so without having to implement all of the metadata stuff.

consider using a soft ioc for this (needs autosave though) something like https://github.com/JeffersonLab/softioc may work. we will need to make this containerised.