Sub: 4.7 issues list

[Williangalvani]

This a list of blocking issues/features for Sub 4.7

Must-have

• Add support for MAV_CMD_DO_SET_ACTUATOR #32033
• Sub: automatically deal with misconfigured lights/actuators #31109
• programatic control of lights

Good to have

• Sub: allow entering into guided mode with no position #31967
• Sub: implement set_target_angle_and_climbrate for scripting #31611
• Sub: Added Depth(external pressure) failsafe #32099
• Sub: support ABOVE_TERRAIN frame in GUIDED mode posvel case #27767
• Sub: allow ignoring axes in MANUAL_CONTROL #32348

[ES-Alexander]

programatic control of lights

We've re-realised that minimal programmatic control of lights could be implemented via MAV_CMD_DO_AUX_FUNCTION options, by adding a handler for it.

The 3-level state is rather limiting, but that could allow 0%/50%/100% as absolute values, or perhaps decrement/cycle/increment as a rough equivalent of current joystick function support. Cycle could be replaced by center if that makes more practical sense 🤷‍♂️

[ES-Alexander]

@Williangalvani noting that #31109 has been merged into master now, but will need to be back-ported to ArduPilot-4.7.