Move to specific dest/source configuration by user request

[klauer]

• Add tool to move motors to their nominal position
• Likely to be added to the Python layer in pcdsdevices
• Original note from: https://github.com/pcdshub/pcdsdevices/pull/950

[klauer]

This is part of the BTMS project which I'll be working on. I might close this issue and put it in a better spot later.