EGNN Condition Encoder w/ Joint Velocities

What's Changed

• setup square_graph task by @caio-freitas in #89
• add GraphConditionEncoder by @caio-freitas in #90
• 79 investigate discretizing gripper control or data by @caio-freitas in #87
• add sweep script based on train by @caio-freitas in #93
• Improve Graph Representation by @caio-freitas in #94

Full Changelog: v1.0.4...v1.1.3