Enable Evolution module and bind shortcut

Add core/evolution.nix with a toggleable option and import it in the
core
defaults. Enable the option on desktop, laptop, and default hosts.
Remove
the duplicated evolution‑data‑server enable flag from services.nix. Add
a
Hyprland keybinding (Super Shift E) to launch Evolution.

modules/core/default.nix

@@ -3,6 +3,7 @@
     ./packages
     ./boot.nix
     ./docker.nix
+    ./evolution.nix
     ./flatpak.nix
     ./fonts.nix
     ./garandos-tui.nix