Add listeners for new qsy:// uri spec

[cwhelchel]

See Jay's new QSY uri scheme here

Add Hunterlog as a receiver for these URI links. Mostly just the spot, log, and tune actions. This will involve registering the URI scheme with each supported OS and handling appropriately. This way links can be clicked on websites, discord, wherever and cause HL to tune the rig or pre-fill a spot into the QSO entry boxes (like clicking a spot row)

Notes from initial tests (windows)

• have to create registry entry
  • Computer\HKEY_CURRENT_USER\SOFTWARE\Classes\qsy\shell\open\command
  • this reg path doesn't requires admin
• need helper batch file (or exe) to massage working directory
• opens multiple instances (no good - needs to do the action in one instance of HL)