Fix emacs icon fonts

emacs/default.nix

@@ -20,4 +20,9 @@
       sha256 = "sha256-ZtpN6wM+R+4w1FCO6axWRNFX8feSau/o3V/wnw5EiJQ=";
     };
   };
+  home.packages = with pkgs; [
+    # Doom Emacs fonts, manually installed with
+    # M-x all-the-icons-install-fonts
+    emacs-all-the-icons-fonts
+  ];
 }