fonts: add Rubik (#68144)

README

@@ -383,6 +383,13 @@ copyright notices:
   #
   # https://www.fontsquirrel.com/fonts/ibm-plex
 
+* Rubik
+  # Copyright (c) 2015 by Hubert & Fischer. All rights reserved
+  #
+  # This Font Software is licensed under the SIL Open Font License, Version 1.1.
+  #
+  # https://www.fontsquirrel.com/license/rubik
+
 ~~~~
 
 Some theme variant files have their own specific licenses; refer to

static/includes/fonts/_rubik.scss

@@ -0,0 +1,23 @@
+$rubik-font-path: '/static/fonts/Rubik' !default;
+
+@mixin rubik-font($type, $weight, $style: normal) {
+	@font-face {
+		font-family: 'Rubik';
+		src: url('#{$rubik-font-path}/Rubik-#{$type}.woff2') format('woff2'),
+		     url('#{$rubik-font-path}/Rubik-#{$type}.woff') format('woff');
+		font-weight: $weight;
+		font-style: $style;
+	}
+}
+
+@mixin rubik-font-pair($type, $weight) {
+	@include rubik-font($type, $weight);
+	@include rubik-font(#{$type}Italic, $weight, italic);
+}
+
+
+@include rubik-font-pair('Light', 300);
+@include rubik-font-pair('Regular', 400);
+@include rubik-font-pair('Medium', 500);
+@include rubik-font-pair('Bold', 700);
+@include rubik-font-pair('Black', 900);