Flesh out Pak support:

 - Add GangPak & LogicPak dev lists
 - Move everything into `yar.pak`
 - Load paks with `yar.pak.load()`
Fix await_start
Fix dump_to
Import Yar from the right namespace
Refactor CLI:

 - Move control code into GlobalState, creates/configures Yar
   instances on demand. Helps commands like checksum, which don’t need
   a connection.
 - Add lookup command, which will find a family/pinout based on ID.
 - Match command names flexibly. Any unique subsequence will match now, ex "lk" -> "lookup", "dr" -> "dumpram", etc.