v0.8.1-dev

• improvements to the serial dsm code including better filter cut selection
• add target tmotorf7
• add logic to allow for profile migration in the configurator
• add two distinct rate profiles, select able via the config or the osd
• add support for actual rates
• fix expo term for betaflight rates
• add support for hdzero osd (canvas/msp displayport)
• a lot of little tweaks and improvements to the osd in general
• split cell count and voltage osd elements
• calculate per cell voltage average and display that in the osd
• preserve bluejay startup tone configuration when using the esc setting in the configurator