Rename setup.sh to scripts/setup.sh

scripts/setup.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+# Prepare a local virtual environment and install dependencies.
+set -eu
+
+VENV_DIR=${VENV_DIR:-.venv}
+PYTHON_BIN=${PYTHON_BIN:-python3}
+
+if [ ! -d "$VENV_DIR" ]; then
+  "$PYTHON_BIN" -m venv "$VENV_DIR"
+fi
+
+# shellcheck disable=SC1090
+. "$VENV_DIR/bin/activate"
+
+pip install --upgrade pip
+pip install -r requirements.txt
+
+echo "Environment ready. Activate with: . $VENV_DIR/bin/activate"