Changes

PR #1914 by majiayu000: feat(code_helper): add stdin support for piping file lists

• Added stdin support for piping file lists to code_helper, enabling commands like find . -name '*.go' | code_helper "instructions" and git ls-files '*.py' | code_helper "Add type hints"
• Implemented automatic detection of stdin pipe mode with single argument (instructions) support
• Enhanced tool to read file paths from stdin line by line while maintaining backward compatibility with existing directory scanning functionality

PR #1915 by majiayu000: feat: parallelize audio chunk transcription for improved performance

• Parallelize audio chunk transcription using goroutines for improved performance