flake updates

- remove deleted nixpkgs-stable pin for sops-nix
- remove kernel pin in global modules (defaults to LTS now)
- migrate nerdfonts to new pkgs.nerd-fonts namespace
- disable calibre-server on palatine-hill (for now)
- add SSH_PORT to gitea

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

systems/artemision/fonts.nix

@@ -3,17 +3,13 @@
   fonts = {
     fontconfig.enable = true;
     enableDefaultPackages = true;
-    packages = with pkgs; [
-      (nerdfonts.override {
-        fonts = [
-          "FiraCode"
-          "DroidSansMono"
-          "Hack"
-          "DejaVuSansMono"
-          "Noto"
-          "OpenDyslexic"
-        ];
-      })
+    packages = with pkgs.nerd-fonts; [
+      fira-code
+      droid-sans-mono
+      hack
+      dejavu-sans-mono
+      noto
+      open-dyslexic
     ];
   };
 }