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/stegasoo-cli-git.install

@@ -0,0 +1,17 @@
+post_install() {
+    echo ""
+    echo "Stegasoo CLI installed successfully!"
+    echo ""
+    echo "Usage:"
+    echo "  stegasoo --help          # Show all commands"
+    echo "  stegasoo encode ...      # Hide data in an image"
+    echo "  stegasoo decode ...      # Extract hidden data"
+    echo "  stegasoo tools --help    # Image tools (compress, rotate, etc.)"
+    echo ""
+    echo "For web UI or REST API, install stegasoo-git instead."
+    echo ""
+}
+
+post_upgrade() {
+    post_install
+}