[WIP] Add example script for gradient connection functions

[Copilot]

Plan: Create Example Script for Gradient Connection Functions

• Explore the repository structure and understand gradient connection functions
• Create example script example_gradient_connections.py in examples/trajectories/
• Demonstrate conversion from trajectory to gradients and slew rates
• Demonstrate conversion from gradients back to trajectory (round-trip)
• Show hardware constraint checking
• Visualize trajectories, gradients, and slew rates
• Test the example script to ensure it runs correctly
• Run code review and security checks

Original prompt

write an example script showcasing the use of the gradient connection functions for trajectories

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