Fusion 360 Gym Refactor

[karldd]

Refactor of the Fusion 360 Gym to align with the paper. Changes include:

• Renaming files/classes to Fusion360Gym*
• Sketch Extrusion and Face Extrusion naming
• Shared use between sketch and face extrusion to get graphs, set target etc
• Lots of new documentation
• Additional graph generation options