Hermes/Fonts: Enable Fonts module and add cascadia-code

Since I've been using WSL2 for past few days, I have been using Windows
Terminal.

While it doesn't really hold a candle to Konsole, it is alright and comes with
Cascadia Code font by default. Over few days, I've come to like this font and
decided to try it out for Emacs within WSL.

flake.nix

@@ -89,6 +89,7 @@
             # Modules and module config
             ./modules/fish.nix
             ./modules/users.nix
+            ./modules/fonts.nix
             # agenix.nixosModules.age
             # ./modules/agenix.nix
 	    nixos-wsl.nixosModules.wsl

modules/fonts.nix

@@ -9,6 +9,7 @@
       julia-mono
       ibm-plex
       jetbrains-mono
+      cascadia-code
     ];
     fontconfig.defaultFonts = { monospace = [ "JetBrains Mono" ]; };
   };