Refactor code structure for improved readability and maintainability

assets/sass/add.scss

@@ -9,3 +9,4 @@
 @import "link";
 @import "weeknote";
 @import "share-button";
+@import "typewriter";

assets/sass/typewriter.scss

@@ -0,0 +1,8 @@
+@font-face {
+	font-family: "Typewriter";
+	src: url("/fonts/American Typewriter Regular.ttf");
+}
+
+.typewriter {
+	font-family: "Typewriter", monospace;
+}