Fonts: Roboto

[DevCharly]

This PR packages the Roboto font (https://fonts.google.com/specimen/Roboto) into a JAR (will be released to Maven Central later) and provides an easy way to use it with FlatLaf.

The font need to be installed before it can be used. E.g.

FlatRobotoFont.install();

To use Roboto as default font in your application, use:

FlatLaf.setPreferredFontFamily( FlatRobotoFont.FAMILY );
FlatLaf.setPreferredLightFontFamily( FlatRobotoFont.FAMILY_LIGHT );
FlatLaf.setPreferredSemiboldFontFamily( FlatRobotoFont.FAMILY_SEMIBOLD );

FlatLightLaf.setup();

//TODO create UI

You can of course also create fonts. E.g.:

// basic styles
new Font( FlatRobotoFont.FAMILY, Font.PLAIN, 12 );
new Font( FlatRobotoFont.FAMILY, Font.ITALIC, 12 );
new Font( FlatRobotoFont.FAMILY, Font.BOLD, 12 );
new Font( FlatRobotoFont.FAMILY, Font.BOLD | Font.ITALIC, 12 );

// light
new Font( FlatRobotoFont.FAMILY_LIGHT, Font.PLAIN, 12 );
new Font( FlatRobotoFont.FAMILY_LIGHT, Font.ITALIC, 12 );

// semibold
new Font( FlatRobotoFont.FAMILY_SEMIBOLD, Font.PLAIN, 12 );
new Font( FlatRobotoFont.FAMILY_SEMIBOLD, Font.ITALIC, 12 );