fonts: add Kumbh Sans (#87142)

README

@@ -458,6 +458,13 @@ copyright notices:
   #
   # https://www.fontsquirrel.com/license/arimo
 
+* Kumbh Sans
+  # Copyright 2020 The KumbhSans Project Authors (https://github.com/xconsau/KumbhSans)
+  #
+  # This Font Software is licensed under the SIL Open Font License, Version 1.1.
+  #
+  # https://github.com/xconsau/KumbhSans/blob/master/OFL.txt
+
 ~~~~
 
 Some theme variant files have their own specific licenses; refer to

static/includes/fonts/_kumbhsans.scss

@@ -0,0 +1,18 @@
+@mixin kumbhsans-font($type, $weight) {
+	@font-face {
+		font-family: 'Kumbh Sans';
+		src: url('/static/fonts/KumbhSans/KumbhSans-#{$type}.woff2') format('woff2');
+		font-weight: $weight;
+		font-style: normal;
+	}
+}
+
+@include kumbhsans-font('Thin', 100);
+@include kumbhsans-font('ExtraLight', 200);
+@include kumbhsans-font('Light', 300);
+@include kumbhsans-font('Regular', 400);
+@include kumbhsans-font('Medium', 500);
+@include kumbhsans-font('SemiBold', 600);
+@include kumbhsans-font('Bold', 700);
+@include kumbhsans-font('ExtraBold', 800);
+@include kumbhsans-font('Black', 900);