Update Clipper/Juice trajectories notebook with interactive and animation plots

Changes

• Add solar system trajectories comparison
• Add interactive plots with ipywidgets sliders
• Add animation movies (see outputs below)
• Improve Clipper-Juice distance analysis

Outputs

Clipper_Juice-Solar_system_orbits

Clipper_Juice-Jupiter_orbits

Note

Only the trajectories kernels required are loaded into the data/ folder (at runtime, skipped if present).

/cc @gtobie