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/hyprland.nix

@@ -127,7 +127,7 @@ in
 
       bind = [
         "$mod, Return, exec, $terminal"
-        "$mod, D, exec, fuzzel"
+        "$mod, D, exec, rofi -show drun"
         "$mod, E, exec, $terminal -e yazi"
         "$mod, Q, killactive"
         "$mod, F, fullscreen"
@@ -140,7 +140,7 @@ in
         # Cycle the current theme's wallpapers (instant, no rebuild).
         "$mod SHIFT, T, exec, nomarchy-theme-sync bg next"
 
-        # Power menu (fuzzel dmenu via the nomarchy-menu dispatcher).
+        # Power menu (rofi dmenu via the nomarchy-menu dispatcher).
         # Not Escape: Super+Escape gets swallowed before reaching the
         # dispatcher on some setups (input methods / modal handling).
         "$mod, X, exec, nomarchy-menu power"