feat: add wallpaper feature with 5 new wallpapers

- Add wallpapers.nix module for wallpaper management
- Update hyprland and rofi configs
- Update m3-ares and m3-kratos user configs
- Update flake inputs

home/features/desktop/default.nix

@@ -13,6 +13,7 @@
     ./office.nix
     ./rofi.nix
     ./theme.nix
+    ./wallpapers.nix
     ./wayland.nix
     ./webapps.nix
   ];
@@ -144,7 +145,7 @@
     # google-chrome
     # gsettings-desktop-schemas
     # graphviz
-    # ksnip
+    ksnip
     msty-studio
     nwg-look
     # pamixer