Feature: Airdrop Prep / Airdrop Approach

[Tyler-Lentz]

https://tritonuas.github.io/wiki/software/obc/tick_architecture/ticks/airdropapproach/

https://tritonuas.github.io/wiki/software/obc/tick_architecture/ticks/airdropprep/

Given:

X bottles left to drop, with their associated locations
Avg wind speed over the mission (?)
Plane avg speed (either detected or set via config)
DROP_MODE:
DIRECT_DROP: the payloads are not self guided, and need the OBC to tell them the exact moment at which to drop
INDIRECT_DROP: the payloads are self guided, so the OBC just needs to pick a bottle and vaguely fly in that direction and notify the active bottle that it can drop at will

Then:

The OBC must select a water bottle to attempt to drop, generate a path to fly over that target, and select a moment at which to perform the drop / a time when to clear the bottle to drop.
A lot depends on whether or not they are guided, and our job is much easier if they are guided, but the way I designed the protocol the OBC should be able to do either mode depending on the DROP_MODE