notebook: compare 4-circle computations

[prjemian]

Compare hklpy, SPEC, and optics/orient computations

Use Si standard and LNO_LAO data:

• https://blueskyproject.io/hklpy/examples/notebooks/tst_e4cv_fourc.html
• https://blueskyproject.io/hklpy/examples/notebooks/geo_e4cv.html#add-a-sample-with-a-crystal-structure
• Compare 4-circle computation with hklpy prjemian/epics-docker#42

[prjemian]

This computation using the provided Si sample and lattice parameter. Results are slightly different than shown in hklpy. Likely difference is due to numerical precision of the lattice parameter.