These functions provide tools for inspecting the color themes available in the current R session.
color.theme.info() is the primary user-facing function for discovering themes by name, source, and type.
color.theme.env() is an advanced function that returns the environment currently used as the theme registry.
It first checks for a user-specified environment via getOption("midr.color.theme.env").
If this option is NULL (the default), the function returns the package's internal environment where the default themes are stored.