💄 style: set Cascadia Code as code font

Modifies the markdown file to showcase the font's ligatures.

content/markdown.md

@@ -9,7 +9,13 @@ tags = ["markdown", "test"]
 
 ```rust
 fn main() {
-    println!("Hello World");
+    let number: u8 = 4;
+
+    match number {
+        i if i == 0 => println!("Zero"),
+        i if i  > 0 => println!("Greater than zero")
+        i if i <= 0 => println!("Smaller or equal to zero"),
+    }
 }
 ```
 ## Quote

sass/main.scss

@@ -12,6 +12,13 @@
   font-display: swap;
 }
 
+@font-face {
+  /* Copyright 2019 - Present, Microsoft Corporation, with Reserved Font Name 'Cascadia Code'. Licensed under the SIL Open Font License, Version 1.1. More information available at: http://scripts.sil.org/OFL */
+  font-family: 'Cascadia Code';
+  src: url('fonts/CascadiaCode.ttf');
+  font-display: swap;
+}
+
 @import 'parts/_archive.scss';
 @import 'parts/_cards.scss';
 @import 'parts/_code.scss';
@@ -32,6 +39,8 @@
   font-family: 'Inter', Arial, Helvetica, sans-serif;
   line-height: 190%;
 
+  --code-font: 'Cascadia Code';
+
   --bg-0: #fff;
   --bg-1: #e7e7e7;
   --bg-2: #fefefe;