* fix: Windows auto-update path detection and add install function support
- Fix Windows path inconsistency: check ~/.config first, then %APPDATA%
- Add actual update installation via runBunInstall when autoUpdate=true
- Check both Windows config locations for comprehensive detection
Closes#402
* fix: address review feedback on error logging and message clarity
- Update misleading log message to clarify fallback behavior
- Serialize error object before logging to prevent {} serialization
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Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>
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