feat: RSoXS live analysis tutorial notebook

[andrewjlevin]

Add a tutorial/template notebook that has standardized data processing for everyone to use as a starting point in analyzing RSoXS data. The general (and tentative) features to include in this notebook are below:

• Draw and/or load in masks
• Refine the beam center and sample-to-detector distance
• Check the mask, beam center, and sample-to-detector distance
• Data browsing (via tiled and/or local files)
• Data loading (via tiled and/or local files)
• Data processing:
• check and select I0/photodiode scans to normalize to
• apply double-normalization corrections
• add Qx & Qy labels to pix_x and pix_y
• integrate detector images to polar I vs Q space
• Save processed xarrays (options to save as netCDF files, zarr stores, etc.)
• Plot (with option to save) standard RSoXS plots (detector images, ISI, intensity heatmaps, intensity vs Q linecuts, anisotropy heatmaps, anisotropy vs Q linecuts)