R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'lightr'

lightr::batch_import |  | Batch import with `lr_get_spec()` and `lr_get_metadata()` | HTML | source | R code
lightr::design-principles |  | Design Principles for lightr | HTML | source | R code
lightr::renormalise |  | Renormalise spectral data with a custom reference | HTML | source | R code
lightr::true_example |  | Real life example | HTML | source | R code