feat(home): switch launcher/menu from fuzzel to rofi 2.0

rofi 2.0 landed in nixpkgs 26.05 with native Wayland (mainline upstreamed
the lbonn rofi-wayland fork — `wayland enabled`), so the original reason
to prefer fuzzel (rofi being X11-only / needing a community fork) is gone.
rofi's `.rasi` is far more expressive than fuzzel's flat INI, which lets
the launcher be a proper themed hero surface and revives the legacy
per-theme launcher designs.

- modules/home/rofi.nix replaces fuzzel.nix: per-element theme generated
  from theme-state.json (accent border, highlighted selection, rounded
  inputbar) via lib.formats.rasi.mkLiteral; themes/<slug>/rofi.rasi
  whole-swap; the nomarchy-menu dispatcher re-pointed to `rofi -dmenu`
  (power/theme/clipboard/calc with -mesg/files/web + root picker).
- SUPER+D is now `rofi -show drun`; the menu binds are unchanged.
- nomarchy.fuzzel.enable → nomarchy.rofi.enable; fuzzel dropped from
  home.packages. Pango handles nf-glyph fallback (no explicit font list
  needed as fuzzel's fcft did). show-icons off until an icon theme ships.

Verified: flake check green, HM generation builds, the generated
theme.rasi parses under `rofi -dump-theme`, Hyprland config verifies.
Not verified: rofi's on-screen rendering needs a real session.

Docs: README menu/override/roadmap sections and the module tree updated;
the per-theme launcher roadmap item now points at porting the legacy
rofi.rasi designs (the whole-swap mechanism is in place).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

modules/home/default.nix

@@ -12,7 +12,7 @@
     ./waybar.nix
     ./ghostty.nix
     ./btop.nix
-    ./fuzzel.nix    # launcher theming + the nomarchy-menu dispatcher
+    ./rofi.nix      # launcher theming + the nomarchy-menu dispatcher
     ./swaync.nix    # notification daemon, themed from the same JSON
     ./idle.nix      # hyprlock + hypridle, themed from the same JSON
     ./yazi.nix      # flagship TUI file manager, themed + plugins
@@ -31,7 +31,6 @@
 
   home.packages = with pkgs; [
     awww       # wallpaper daemon with animated transitions (the swww fork)
-    fuzzel     # launcher / dmenu (used by the theme picker bind)
     libnotify
   ];