refactor: rename files

src/setup/initEngine262.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# Add the engine262 repository as a git subtree (squashed)
+# Usage: ./setup/initEngine262.sh
+# This will add the repository at ./engine262 using a squashed subtree
+
+set -euo pipefail
+
+REPO_URL="https://github.com/bendtherules/engine262"
+REPO_ROOT=$(git rev-parse --show-toplevel)
+TARGET_DIR="${REPO_ROOT}/engine262"
+
+# Add the repository as a git subtree (squashed)
+# If the target directory already exists, assume the subtree is present.
+if [ ! -d "$TARGET_DIR" ]; then
+  git -C "${REPO_ROOT}" subtree add --prefix=engine262 "$REPO_URL" main --squash
+else
+  echo "Subtree already present at $TARGET_DIR"
+fi
+
+echo "Subtree added and initialized at ./$TARGET_DIR"