uploading optical forces notebook

[FilipeFcp]

Hi all,
I finally found some time to finish this. As always, all comments are very welcome.
@momchil-flex , just tagging you in case you’d like to take a look.

Of course, feel free to review it next year.
Happy holidays!

[github-actions]

Spell Check Report

MaxwellStressTensor.ipynb:

Cell 6, Line 71: 'energy-density'
  > # Scalar energy-density terms appearing in the stress tensor formula.
Cell 10, Line 7: 'planar-scattering'
  > """Build a planar-scattering simulation for a slab and surrounding monitors."""
Cell 13, Line 4: 'Pre-allocate'
  > # Pre-allocate containers for the force components keyed by face axis.
Cell 19, Line 24: 'centre'
  > # Distance from simulation centre to each waveguide centre along y.

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Checked 1 notebook(s). Found spelling errors in 1 file(s).
Generated by GitHub Action run: https://github.com/flexcompute/tidy3d-notebooks/actions/runs/20468941756

[tomflexcompute]

Great new use case @FilipeFcp ! The stress tensor calculation is a bit tedious but we can leave it for now and maybe package it up as a monitor or some convenient feature in the future if we receive more requests.

[daquinteroflex]

Can this be merged?