Initial commit: Add project files

scripts/verify-prerequisites.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+command -v dotnet >/dev/null || { echo "dotnet SDK 10 is required" >&2; exit 1; }
+command -v node >/dev/null || { echo "Node.js is required" >&2; exit 1; }
+command -v corepack >/dev/null || { echo "corepack is required" >&2; exit 1; }
+
+dotnet --version
+node --version
+corepack --version
+
+if [[ ! -f frontend/pnpm-lock.yaml ]]; then
+  echo "frontend/pnpm-lock.yaml is missing. Run 'cd frontend && corepack enable && pnpm install' and commit it." >&2
+  exit 2
+fi