misc: distribute Bitter font (#25260)

README

@@ -79,6 +79,14 @@ copyright notices:
   #
   # https://www.fontsquirrel.com/license/oswald
 
+* Bitter font
+  # Copyright (c) 2011, Sol Matas (www.huertatipografica.com.ar),
+  # with Reserved Font Name “Bitter”
+  #
+  # This Font Software is licensed under the SIL Open Font License, Version 1.1.
+  #
+  # https://www.fontsquirrel.com/license/bitter
+
 ~~~~
 
 Some theme variant files have their own specific licenses; refer to

static/includes/_font-bitter.scss

@@ -0,0 +1,17 @@
+$bitter-font-path: '../fonts/Bitter' !default;
+
+@mixin bitter-font($type, $weight, $style) {
+    @font-face {
+        font-family: 'Bitter';
+        src: url('#{$bitter-font-path}/Bitter-#{$type}.woff2') format('woff2'),
+             url('#{$bitter-font-path}/Bitter-#{$type}.woff') format('woff'),
+             url('#{$bitter-font-path}/Bitter-#{$type}.otf') format('opentype');
+        font-weight: $weight;
+        font-style: $style;
+    }
+}
+
+@include bitter-font('Regular', 400, normal);
+@include bitter-font('BoldItalic', 700, italic);
+@include bitter-font('Italic', 400, italic);
+@include bitter-font('Bold', 700, normal);