PX4 SDK Mode registration

[Jaeyoung-Lim]

Describe problem solved by the proposed feature

this is a review on trying PX4 SDK for PX4 Space Systems

Describe your preferred solution

pxh> commander status
INFO  [commander] Disarmed
INFO  [commander] navigation mode: Position
INFO  [commander] user intended navigation mode: Position
INFO  [commander] in failsafe: no
INFO  [commander] External Mode 1: nav_state: 23, name: My Manual Mode

Describe possible alternatives

We could implement everything in offboard mode

Additional context

No response