refactor: restructure project layout and add install.mjs

- Move src/ → plugin/ with subdirectories:
  - plugin/core/ (business logic, models, store, permissions, utils, memory)
  - plugin/tools/ (query, resources)
  - plugin/commands/ (placeholder for slash commands)
  - plugin/hooks/ (placeholder for lifecycle hooks)
  - plugin/index.ts (wiring layer only, no business logic)
- Add install.mjs with --install, --uninstall, --openclaw-profile-path
- Add skills/ and docs/ root directories
- Move planning docs (PLAN.md, FEAT.md, AGENT_TASKS.md) to docs/
- Remove old scripts/install.sh
- Update tsconfig rootDir: src → plugin
- Update README.md and README.zh.md with new layout
- Bump version to 0.2.0
- All tests pass

package.json

@@ -1,11 +1,11 @@
 {
   "name": "openclaw-plugin-yonexus",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Yonexus OpenClaw plugin: hierarchy, identities, permissions, and scoped memory",
   "main": "dist/yonexus/index.js",
   "types": "dist/yonexus/index.d.ts",
   "scripts": {
-    "build": "tsc -p tsconfig.json",
+    "build": "tsc -p tsconfig.json && cp plugin.json dist/yonexus/plugin.json",
     "clean": "rm -rf dist",
     "prepare": "npm run clean && npm run build",
     "test:smoke": "tsx tests/smoke.ts",