misc: add Nunito Sans font (#81063)

README

@@ -444,6 +444,13 @@ copyright notices:
   #
   # https://github.com/Omnibus-Type/MuseoModerno/blob/master/LICENSE.md
 
+* Nunito Sans
+  # Copyright 2016 The Nunito Project Authors (contact@sansoxygen.com),
+  #
+  # This Font Software is licensed under the SIL Open Font License, Version 1.1.
+  #
+  # https://www.fontsquirrel.com/license/nunito-sans
+
 ~~~~
 
 Some theme variant files have their own specific licenses; refer to

static/includes/fonts/_nunitosans.scss

@@ -0,0 +1,22 @@
+@mixin nunitosans-font($type, $weight) {
+	@font-face {
+		font-family: 'Nunito Sans';
+		src: url('/static/fonts/NunitoSans/NunitoSans-#{$type}.woff2') format('woff2');
+		font-weight: $weight;
+		font-style: normal;
+	}
+	@font-face {
+		font-family: 'Nunito Sans';
+		src: url('/static/fonts/NunitoSans/NunitoSans-#{$type}Italic.woff2') format('woff2');
+		font-weight: $weight;
+		font-style: italic;
+	}
+}
+
+@include nunitosans-font('ExtraLight', 200);
+@include nunitosans-font('Light', 300);
+@include nunitosans-font('Regular', 400);
+@include nunitosans-font('Semibold', 600);
+@include nunitosans-font('Bold', 700);
+@include nunitosans-font('ExtraBold', 800);
+@include nunitosans-font('Black', 900);