[WIP] Implement CodeFieldValuePrinter to streamline process

[Copilot]

Implementation Plan for CodeFieldValuePrinter Optimization

• Understand the current implementation in PipelineTool.cpp
• Research SetDefaultFieldValuePrinter API usage
• Modify PipelineTool.cpp to use SetDefaultFieldValuePrinter instead of loop
• Verify the same pattern exists in Convert.cpp and update it if needed
• Build the project to verify compilation
• Test the changes manually with sample pipeline files
• Run any existing tests to ensure no regressions

Original prompt

Work on TODO: Implement CodeFieldValuePrinter (google::protobuf::TextFormat::FastFieldValuePrinter) to avoid this step here. (from tools/aeontool/PipelineTool.cpp)

Created from VS Code via the GitHub Pull Request extension.

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