v2.5 : virtual WBI destructur

While tab completion in poke param and v0 board configs are not huge enhancements, the addition of a virtual desctructor for the abstract base class WishboneInterface is necessary in order to allow tb-online to close the polarfire connection allowing users to put the run control in the "uninitialized" state and connect via pftool.

What's Changed

• tab completion in poke param by @tomeichlersmith in #65
• Config v0 by @EinarElen in #66
• add virtual WBI destructor by @tomeichlersmith in f154bdd

Full Changelog: v2.4.1...v2.5.0