add setup script

Author: calebporzio

scripts/setup.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ── Install deps ─────────────────────────────────────────────────────────────
+echo "Installing npm dependencies..."
+(cd "$DEST" && npm install --silent 2>&1) || {
+    echo "  WARNING: npm install failed"
+}