[COMMAND] Implement UNTIL command

• Implement command UNTIL
• For example: START cnc yaw 0 50 THEN until arrivewp THEN cnc land END

changed milestone to %Stage 2 Developing (Sprint 04)

added FEATURE label

changed weight to 15

changed title from Implement UNTIL command to [COMMAND] Implement UNTIL command

marked this issue as related to #120 (closed)

changed milestone to %DroneOA Project MS 04

created merge request !77 (merged) to address this issue

mentioned in merge request !77 (merged)

closed via merge request !77 (merged)

mentioned in commit a81a1892

added STATUS::MERGED label