cg33 5e2f3b9eba docs(sponsors): add runapi.co as new sponsor (#1277) ...

- Insert logo and description between Shengsuanyun and AICodeMirror
  in both README.md and README.zh-CN.md.
- Add assets/sponsors/runapi.jpg (logo supplied by runapi.co).
- Sponsor copy and registration link provided by runapi.co.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

2026-06-08 22:09:30 +08:00

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