Register font 'Liberation Mono' 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.
See also
font_set_liberation(), font_set()
Other functions for font management:
addGFontHtmlDependency(),
fonts_cache_dir(),
gfontHtmlDependency(),
install_gfont_script(),
installed_gfonts(),
liberationmonoHtmlDependency(),
liberationsansHtmlDependency(),
liberationserifHtmlDependency(),
register_gfont(),
register_liberationsans(),
register_liberationserif()