Update dataset card after healthy_bone_cell upload: README.md

Add files using upload-large-folder tool

Document physical target visualization color scales

Add optional target physical-range mapping: README.md

Add Mueller matrix normalization guidance: README.md

Update dataset card after external splits upload: README.md

Split waveplate and spectral dataset configs

Upload external pilot data: README.md

Upload external_waveplate pilot: README.md

initial commit