theme_sca: A clean, consistent ggplot2 theme for speccurvieR plots.
Description
`theme_sca()` is the shared theme applied by the package's plotting
functions. It is exported so the same look can be reused or tweaked when
customising the plots they return.
Base font size, passed to [ggplot2::theme_minimal()].
Defaults to `11`.
base_family
Base font family, passed to [ggplot2::theme_minimal()].
Defaults to the value of the `speccurvieR.base_family`
option, or `""` (the graphics device's default font) if
that option is unset, so plots stay portable across
machines. Set the option (e.g.
`options(speccurvieR.base_family = "Roboto")`) or pass a
family directly to use a specific font.