docs(ourdigital): align brand/blog/designer skill references to v3.3/v2.1 (#10)
Merge-align the core trio's reference material to the authoritative OurDigital
guides (Blog Project Instruction v3.3, Writing Style Guide v2.1, Visual Style
Guide v2.1), preserving each skill's structure:
- 01-brand-guide: brand-foundation + writing-style — identity statement, mission,
three channels, OurDigital-vs-Clinic boundary, four writing principles,
평서체/전문용어 병기 rules, authority order.
- 02-blog: blog-style-guide — channel identity, writing characteristics,
post structure (char counts), SEO (title/meta/English slug), Ghost metadata,
self-edit checklist.
- 06-designer: visual_metaphors (both copies kept identical) — bright editorial
minimalism, Preferred/Avoid metaphor dictionary, 5 palettes, signature motifs,
Korean-via-restraint, human-trace rule.
Source of truth: knowledge-base/ourdigital in our-ai-editor (PR #12).
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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