fix: enrich Chinese superpowers prompts to match English versions

fix: enrich superpowers prompts with full SKILL.md content

feat: extract 8 core prompts from Matt Pocock skills (English + Chinese)

feat: extract 6 core gstack prompts (English + Chinese)

feat: extract 6 core GSD prompts (English + Chinese)

feat: add Chinese version of superpowers prompts

feat: extract 5 core superpowers skills as standalone prompts

fix: English README - remove all Chinese text, keep only English

fix: Mermaid diagram syntax - remove /node/ pattern that GitHub can't parse

docs: enrich README with diagrams, harness details, and deep comparison

init: awesome-harness-engineering