New Tail Shapes

[MateusStano]

Short Description:
Add different boattail shapes

Long Description:
Currently RocketPy only considers for its simulation conical tails. Implement other tail shapes, much like the Nosecone.

The implementation would require two thing that would need to be researched:

1. The formula for the lift coefficient derivative for that tail shape
2. The formula for the center of pressure for that tail shape