Register font 'Liberation Serif' so that it can be used with devices using the 'systemfonts' package, i.e. the 'flextable' package and graphic outputs generated with the 'ragg', 'svglite' and 'ggiraph' packages.
register_liberationserif()TRUE if the operation went ok.
Other functions for font management:
addGFontHtmlDependency(),
fonts_cache_dir(),
gfontHtmlDependency(),
install_gfont_script(),
installed_gfonts(),
liberationmonoHtmlDependency(),
liberationsansHtmlDependency(),
liberationserifHtmlDependency(),
register_gfont(),
register_liberationmono(),
register_liberationsans()