XRT generalization

[MTakahashi-KWH]

Generalizing xrt backend to work with any arbitrary beamline setup through xml (json may well also be integrated easily).

• Pass an xml file to the XRTBackend initialization
• run infer_motors and infer_detectors on the backend to collect dicts of inferred elements
  • you can make your own det/motor versions using the backend.elements data member also.
  • You can also alias the inferred device how you want
• set your primary detector element
• the devices act like any runengine detector or motor with the movable and readable interfaces
• run like any other blop dof or det

Stable, with caching and greedy invalidation. Barebones demo notebook exists in markdown in tutorials. Most functionality outside of backend function is demoed.

this may be of interest to:
@jessica-moylan
@thopkins32

please let me know of any QOL or improvements preferred for this before i open a full pull request

[checkmarx-gh-ast-us-povs]

Checkmarx One – Scan Summary & Details – 06bdd133-5a08-4a67-9fea-dc635b21e6af

Great job! No new security vulnerabilities introduced in this pull request

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[MTakahashi-KWH]

lol, i think the doc build fails cause i just dumped the xml in the doc directory to build the tutorial in ipynb ¯_(ツ)_/¯