Add a new ProcessController Device, based on the [Linkam Temperature Controller support](https://github.com/APS-USAXS/ipython-usaxs/issues/142) from the USAXS instrument. Adapt [this code](https://github.com/APS-USAXS/ipython-usaxs/blob/bdd46dc0cb9b9e6a3b68ec528003aa972a14866f/profile_bluesky/startup/10-devices.py#L404-L519) to create the `ProcessController` base class.