v2.3.1

Added

• tools/update_github_releases.py: one-shot script to sync GitHub Release bodies via API using local tools/release-notes/ snippets

Fixed

• Linux overlay shims (tools/linux/overlay/include/) now use #include_next instead of #include to forward to the real MinGW system header, avoiding infinite preprocessor recursion on Linux/WSL (GCC 12+)
• Removed stale prebuilt plugins/*/nsis7z.dll binaries from the repository

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