Wae demo paths

[guilhermedemouraa]

No description provided.

[guilhermedemouraa]

I think that it would be cool to have this example on our website to teach folks how to create their own custom paths. I like the idea of sharing our own path used at the WAE. But I'm open to suggestions. One thing I thought that would be cool is if we take in as args row_length, row_spacing, and n_rows. So we could just make something more general...

On a more note:
I added some methods that don't seem extremely useful in the class right now (e.g., pop_last_segment, reverse_track) - My idea is that sometime soon, we will enable path planning (at least the basics such as straight lines and turns) through our UI. In that case, those extra methods will come in very handy.

[Hackerman342]

If you want to move the TrackBuilder class into py/examples/track_planner/track_builder.py (as noted in one comment), then I'll approve right away. If you want this in the actual farm-ng-amiga module, then we need to harden it and consider how it will be used in the codebase / apps / etc.. This is because we will want to avoid breaking backwards compatibility once it is merged, and especially once it is released