feat(system): comprehensive branding, styling, and system feature update

- Relocate themes to assets/themes/ and update all references.
- Implement custom SDDM theme and Plymouth theme enhancements.
- Add themed templates for Alacritty, Hyprland, Waybar, and other apps.
- Introduce Makima key remapper module and configuration.
- Add Voxtype and Walker configurations.
- Implement systemd power management and timeout optimizations.
- Add Nautilus-python extensions for LocalSend.
- Update branding assets and ASCII art integration.

bin/system/nomarchy-update

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# Nnomarchy Update Script
+# 1. Updates the flake inputs in /etc/nixos
+# 2. Applies system-wide NixOS changes
+# 3. Applies user-level Home Manager changes
+
+set -e
+
+REPO_DIR="/etc/nixos"
+
+if [ ! -d "$REPO_DIR" ]; then
+    echo "Error: $REPO_DIR not found. Are you running on a Nnomarchy system?"
+    exit 1
+fi
+
+echo "--- Starting Nnomarchy Update ---"
+
+# 1. Update Flake Lock
+echo "Updating flake inputs..."
+sudo nix --extra-experimental-features "nix-command flakes" flake update --flake "$REPO_DIR"
+
+# 2. Rebuild System
+echo "Applying system-level updates..."
+sudo nixos-rebuild switch --flake "$REPO_DIR#default" --impure
+
+# 3. Rebuild Home Environment
+echo "Applying user-level updates..."
+home-manager switch --flake "$REPO_DIR#default" --impure
+
+# 4. Commit changes if it's a git repo
+if [ -d "$REPO_DIR/.git" ]; then
+    echo "Committing update to local history..."
+    sudo git -C "$REPO_DIR" add flake.lock
+    sudo git -C "$REPO_DIR" commit -m "chore: update system (flake.lock)" || echo "No lockfile changes to commit."
+fi
+
+echo "--- Nnomarchy Update Complete ---"