Fix(skill): Standardize UTF-8 encoding and parser output unpacking

[ruishizou]

Summary

• Add encoding="utf-8" in skills wherever applicable
• Resolve only 2 values of the parser (when some return 3)

Scope of change

All scripts within the skill/scripts folder

Validation

• pytest tests/ successful
• /openaireview <arXiv paper link> in Claude code (on Windows cmd) without error

[joe32140]

Thanks @ruishizou for the fix! The UTF-8 encoding changes are spot on for Windows compatibility, and the parser unpacking fix is the right call. I applied one additional patch on top — overall_path.read_text() in save_viz_json.py was the only remaining call missing the encoding. Merging now!