feat(ingest): downstream humanizer anti-slop writing skill

[harshsinghmp]

Classification

actionable-feature

Context & Rationale

blader/humanizer provides 35 Wikipedia-grounded anti-slop patterns (Wikipedia:Signs of AI writing) that strip inflated importance, AI cliches, overused words, and formulaic outlooks without altering factual content or code blocks.

Scope & Ingestion Plan

1. Ingest upstream from https://github.com/blader/humanizer.
2. Place into skills/creative/humanizer.
3. Register in skills.manifest.json and catalog under Creative, UI/UX & Visuals.
4. Ensure pure markdown compatibility across all local runtimes.

Verification Criteria

• skills/creative/humanizer/SKILL.md exists and passes manifest schema validation.
• Registered in skills.manifest.json.
• Validated via bun test.