feat(branding): fastfetch logo + Nomarchy.ttf glyph in the Waybar button

Two branding follow-ups, using the vendored legacy assets:

- fastfetch (modules/home/fastfetch.nix, nomarchy.fastfetch.enable): the
  vector logo recolored to the palette accent and rendered to compact
  block-art via chafa at build time (so it tracks the theme), fronting a
  curated module list. Replaces the oversized legacy ASCII.
- Waybar logo glyph: vendor Nomarchy.ttf (modules/nixos/branding/),
  install it via fonts.packages, and switch the summer-day/night menu
  buttons to its U+F000 mark with `font-family: Nomarchy` pinned in CSS
  (Nerd Fonts also occupy U+F000, so the pin is required). Glyph stored as
  the  JSON escape for robustness.

Also log a roadmap item for a quality-of-life alias collection.

Verified: font family resolves as "Nomarchy" and the ttf maps U+F000;
both summer jsonc parse; chafa logo builds headless; nix flake check passes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

modules/home/fastfetch.nix

@@ -0,0 +1,50 @@
+# fastfetch — system summary fronted by the Nomarchy monogram. The logo is
+# rendered from the vendored vector mark (modules/nixos/branding/logo.svg)
+# via chafa at build time, recolored to the palette accent — so it's a
+# compact, themed block-art logo that tracks the theme on each
+# home-manager switch (rather than the oversized legacy ASCII).
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.nomarchy;
+  c = cfg.theme.colors;
+
+  logo = pkgs.runCommand "nomarchy-fastfetch-logo"
+    { nativeBuildInputs = [ pkgs.imagemagick pkgs.librsvg pkgs.chafa ]; } ''
+    rsvg-convert -w 220 ${../nixos/branding/logo.svg} > logo.png
+    magick logo.png -fill "${c.accent}" -colorize 100 logo-c.png
+    chafa --format symbols --symbols block --size 20x10 --colors full --polite on logo-c.png > $out
+  '';
+in
+{
+  config = lib.mkIf cfg.fastfetch.enable {
+    programs.fastfetch = {
+      enable = true;
+      settings = {
+        logo = {
+          type = "file-raw";
+          source = "${logo}";
+          padding = { top = 1; left = 2; right = 3; };
+        };
+        display.separator = "  ";
+        modules = [
+          "break"
+          { type = "os"; key = "distro"; keyColor = "blue"; }
+          { type = "kernel"; key = "kernel"; keyColor = "blue"; }
+          { type = "uptime"; key = "uptime"; keyColor = "blue"; }
+          { type = "packages"; key = "pkgs"; keyColor = "blue"; }
+          { type = "wm"; key = "wm"; keyColor = "blue"; }
+          { type = "shell"; key = "shell"; keyColor = "blue"; }
+          { type = "terminal"; key = "term"; keyColor = "blue"; }
+          "break"
+          { type = "cpu"; key = "cpu"; keyColor = "magenta"; }
+          { type = "gpu"; key = "gpu"; keyColor = "magenta"; }
+          { type = "memory"; key = "memory"; keyColor = "magenta"; }
+          { type = "disk"; key = "disk"; keyColor = "magenta"; }
+          "break"
+          { type = "colors"; symbol = "circle"; }
+        ];
+      };
+    };
+  };
+}