feat: add script for renaming legacy artifacts

- Introduced `rename_legacy_artifacts.sh` to automate the renaming of legacy artifacts with a '-legacy' suffix for better differentiation and maintainability.

scripts/rename_legacy_artifacts.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+shopt -s nullglob
+
+patterns=(
+  "dist/*-win-installer.exe"
+  "dist/*-win-portable.exe"
+  "dist/*-linux.AppImage"
+  "dist/*-linux.deb"
+)
+
+for pattern in "${patterns[@]}"; do
+  for f in $pattern; do
+    dir=$(dirname "$f")
+    base=$(basename "$f")
+    ext="${base##*.}"
+    name="${base%.$ext}"
+    mv "$f" "$dir/${name}-legacy.${ext}"
+  done
+done