- Add needsUtf8Bom() to detect when UTF-8 BOM is needed based on file
extension and system code page
- PowerShell 5.1 on non-UTF-8 Windows systems (e.g. GBK) requires BOM
to read scripts correctly
- Remove default UTF8 encoding; undefined now triggers auto-detection
- Add tests for needsUtf8Bom() covering Windows/non-Windows scenarios
This ensures PowerShell scripts are written with UTF-8 BOM on systems
that need it, fixing character encoding issues for non-ASCII content.
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>
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