build: support both registry publish and git clone install

- Add root package.json with files[] for registry publishing
- Add prepare script to sync dist/ from plugin/
- Add postinstall to auto-run install script
- Modify install script: auto-create dist/ if missing (git clone case)
- Plugin works in both scenarios:
  * npm install @hangman-lab/dirigent -> uses bundled dist/
  * git clone + node scripts/install-dirigent-openclaw.mjs -> auto-creates dist/

package.json

@@ -0,0 +1,39 @@
+{
+  "name": "@hangman-lab/dirigent",
+  "version": "0.2.0",
+  "description": "Dirigent - Rule-based no-reply gate with provider/model override and turn management for OpenClaw",
+  "type": "module",
+  "files": [
+    "dist/",
+    "plugin/",
+    "no-reply-api/",
+    "discord-control-api/",
+    "docs/",
+    "scripts/install-dirigent-openclaw.mjs",
+    "docker-compose.yml",
+    "Makefile",
+    "README.md",
+    "CHANGELOG.md",
+    "TASKLIST.md"
+  ],
+  "scripts": {
+    "prepare": "mkdir -p dist/dirigent && cp plugin/* dist/dirigent/",
+    "postinstall": "node scripts/install-dirigent-openclaw.mjs --install",
+    "uninstall": "node scripts/install-dirigent-openclaw.mjs --uninstall"
+  },
+  "keywords": [
+    "openclaw",
+    "plugin",
+    "discord",
+    "moderation",
+    "turn-management"
+  ],
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://git.hangman-lab.top/nav/Dirigent.git"
+  },
+  "engines": {
+    "node": ">=20"
+  }
+}