feat(services): full optional app menu + 7 more opt-in service toggles

Make the whole workstation menu available, all off/commented by default.

home.nix: the bare GUI apps become a categorized commented menu (~50
suggestions across browsers, comms, office, notes, code, graphics, A/V,
media, gaming, files/sync, security, system, local AI) — uncomment to add.

services.nix: the members that need system config (not just a package)
become opt-in nomarchy.services.* toggles, each with a commented example
in the downstream system.nix:
  - docker     → rootful Docker + user in docker group; asserts against the
                 podman docker-compat (both provide the `docker` command)
  - kdeconnect → programs.kdeconnect (opens phone-pairing ports)
  - gamemode   → Feral GameMode daemon
  - adb        → android-tools (programs.adb was removed; systemd ≥258 does
                 the device uaccess udev rules, so no group needed)
  - wireshark  → Qt GUI + user in wireshark group (capture without root)
  - ollama     → local LLM runtime on 127.0.0.1:11434
  - printing   → CUPS + Avahi/mDNS network printer discovery

README option table and ROADMAP (services item now "Fifteen shipped";
local-AI / containers / gaming / devices areas marked) updated. All seven
branches eval-verified with the toggles forced on; the docker/podman
assertion confirmed firing.

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

templates/downstream/system.nix

@@ -39,6 +39,13 @@
   # nomarchy.services.steam.enable = true;     # Steam (32-bit libs, controllers, ports)
   # nomarchy.services.libvirt.enable = true;   # libvirt/KVM + virt-manager GUI
   # nomarchy.services.obs.enable = true;       # OBS Studio + v4l2loopback virtual camera
+  # nomarchy.services.docker.enable = true;    # Docker rootful (not alongside podman)
+  # nomarchy.services.kdeconnect.enable = true;# KDE Connect phone integration (opens ports)
+  # nomarchy.services.gamemode.enable = true;  # Feral GameMode performance daemon
+  # nomarchy.services.adb.enable = true;       # Android adb/fastboot tools
+  # nomarchy.services.wireshark.enable = true; # Wireshark GUI (wireshark group, no root)
+  # nomarchy.services.ollama.enable = true;    # local LLM runtime (127.0.0.1:11434)
+  # nomarchy.services.printing.enable = true;  # CUPS + Avahi network printer discovery
 
   system.stateVersion = "26.05";
 }