Add --lino-output option to write LiNo output to file

[konard]

🎯 Issue Reference

Fixes #8 - On option --lino-output write the lino the file

📝 Implementation Summary

This PR adds the --lino-output option to the LiNo CLI tool, allowing users to write LiNo output to a file instead of console output.

✨ Key Features

• New Option: Added --lino-output <path> to specify output file path
• Flexible Output: Works with all existing output modes (--structure, --before, --after, --changes)
• Backward Compatible: When --lino-output is not specified, output goes to console as before
• Error Handling: Proper error handling for file operations with descriptive error messages

🔧 Technical Details

• Modified Program.cs to add the new command line option
• Used InvocationContext approach to handle 9+ command line parameters (System.CommandLine limitation)
• Added helper methods PrintAllLinksToFile and PrintChangeToFile for unified file output
• Implemented proper StreamWriter management with try-finally blocks

📋 Usage Examples

# Write all links to a file
dotnet run -- --after --lino-output output.lino

# Write structure of link ID 1 to a file  
dotnet run -- --structure 1 --lino-output structure.lino

# Write changes from a query to a file
dotnet run -- --query "((old) (new))" --changes --lino-output changes.lino

# Write before and after states to a file
dotnet run -- --query "((old) (new))" --before --after --lino-output states.lino

✅ Testing

• Code compiles successfully with no errors
• All existing tests pass (verified with dotnet test)
• New option appears in help output (--help)
• File creation and error handling work correctly
• Maintains full backward compatibility

🚀 Ready for Review

This implementation is complete and ready for review. The feature works as requested in the issue and maintains all existing functionality while adding the new file output capability.

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