Improve mock AIS boat moving logic

[patrick-5546]

Use track made good instead of true heading in the mock AIS boats

Relevant code

Mock AIS boat moving logic

https://github.com/UBCSailbot/local-pathfinding/blob/5259485a46a1b11c73f961a503d20eb9f8401c9f/python/MOCK_AIS.py#L81-L87

References

• Adding track made good for sailbot: Separate track made good and heading #272

[tylerlum]

TODO:

• Add track made good and heading for the AISShip, and then properly model this. (eg. should the wedges that represent other ships be in heading or track made good dir? Does it matter?)