feat: add OpenClaw support

- Add OpenClaw target in installer (detect .openclaw/, install to skills/)
- Add OpenClaw to README supported tools list, manual install, config table
- Add docs/README.openclaw.md installation guide
- Add openclaw keyword to package.json

bin/superpowers-zh.js

@@ -19,6 +19,7 @@ const TARGETS = [
   { name: 'Trae',          dir: '.trae/rules',               detect: '.trae' },
   { name: 'Antigravity',   dir: '.antigravity/skills',       detect: '.antigravity' },
   { name: 'VS Code',       dir: '.github/superpowers',       detect: '.github/copilot-instructions.md' },
+  { name: 'OpenClaw',      dir: 'skills',                     detect: '.openclaw' },
 ];
 
 function countDirs(dir) {
@@ -37,7 +38,7 @@ function showHelp() {
 
   说明：
     自动检测当前项目使用的 AI 编程工具：
-    Claude Code / Cursor / Codex / Kiro / DeerFlow / Trae / Antigravity / VS Code
+    Claude Code / Cursor / Codex / Kiro / DeerFlow / Trae / Antigravity / VS Code / OpenClaw
     将 ${countDirs(SKILLS_SRC)} 个 skills 安装到对应目录。
     Claude Code 还会额外安装 agents 到 .claude/agents/。
     如果未检测到任何工具，默认安装到 .claude/skills/ 和 .claude/agents/。