commander: publish full home attitude, not only yaw (#19717)

According to the mavlink spec we should be publishing the home attitude
as a quaternion rather than just the yaw/heading.

Additionally, this allows setting the landing roll and pitch angle using
DO_SET_HOME (this yet needs to go into the MAVLink spec though).

msg/versioned/HomePosition.msg

@@ -12,6 +12,8 @@ float32 x				# X coordinate in meters
 float32 y				# Y coordinate in meters
 float32 z				# Z coordinate in meters
 
+float32 roll				# Pitch angle in radians
+float32 pitch				# Roll angle in radians
 float32 yaw				# Yaw angle in radians
 
 bool valid_alt		# true when the altitude has been set