🔒 Replaced swaylock with Hyprlock

- Removed Swaylock
- Added Hyprlock with Catppuccin theme.
- Replaced commands to swaylock with hyprlock.
- Added JetBrains Mono Nerd Font

hyprland/default.nix

@@ -13,10 +13,13 @@
     hyprpolkitagent # Auth deamon providing modals for password auth
   ];
 
-  programs.hyprland = {
-    enable = true;
-    xwayland.enable = true;
+  programs = {
+    hyprland = {
+      enable = true;
+      xwayland.enable = true;
+    };
+    hyprlock.enable = true; # Lock screen
   };
 
-  services.hypridle.enable = true;
+  services.hypridle.enable = true; # Lock when unused
 }