Driver/Keysight DMM (#556)

* feat: Add a Keysight_34465A driver

Add a first file for a driver for the Keysight 34465A DMM and a
benchmarking notebook

* Add trigger parameters to driver

Add four trigger parameters to the driver.

* refactor: Remove 'READ?' as volt get_cmd

Make a more general get_cmd for the volt parameter. Using simply 'READ?' is wrong in many cases.

* feat: Add sampling parameters

Add four parameters for sampling.

* fix: Fix wrong volt parameter get_cmd

* WIP: Add Array parameter

* feat: Add functioning data buffer parameter

* Move notebook

* Respond to review