Add stegasoo-cli AUR package (CLI-only, no web deps)

New package in aur-cli/ for CLI-only installation:
- Installs [cli,dct,compression] extras only
- No flask/gunicorn/fastapi/uvicorn/pyzbar dependencies
- 68MB vs 79MB for full package
- Conflicts with stegasoo-git (can't install both)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

aur-cli/test-build.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# Test build the AUR CLI package locally
+
+set -e
+
+cd "$(dirname "$0")"
+
+echo "=== Cleaning previous builds ==="
+rm -rf stegasoo-cli-git pkg src *.pkg.tar.zst *.whl 2>/dev/null || true
+
+echo "=== Generating .SRCINFO ==="
+makepkg --printsrcinfo > .SRCINFO
+
+echo "=== Building package ==="
+makepkg -sf
+
+echo "=== Package built ==="
+ls -la *.pkg.tar.zst
+
+echo ""
+echo "To install: sudo pacman -U stegasoo-cli-git-*.pkg.tar.zst"
+echo "To test:    makepkg -si"