PR #4654 replaced ml-paper-writing with research-paper-writing, preserving
the writing philosophy and reference files but dropping the dedicated
'Sources Behind This Guidance' attribution table from the SKILL.md body.
Re-adds:
- The researcher attribution table (Nanda, Farquhar, Gopen & Swan, Lipton,
Steinhardt, Perez, Karpathy) with affiliations and links to SKILL.md
- Orchestra Research credit as original compiler of the writing philosophy
- 'Origin & Attribution' section in sources.md documenting the full chain:
Nanda blog → Orchestra skill → teknium integration → SHL0MS expansion
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