整理项目记忆与Agent RAG入口

迁移项目共享记忆到 docs/project-memory，保留 .hermes 仅作为工具目录

新增 Agent 本地 RAG 索引与上下文包检索脚本

记录 RAG 依赖只安装到 .rag/runtime 并加入忽略规则

同步文档与检查脚本中的项目记忆路径

package.json

@@ -65,6 +65,8 @@
     "codegraph:index": "codegraph index .",
     "codegraph:sync": "codegraph sync .",
     "codegraph:status": "codegraph status .",
+    "rag:index": "node scripts/rag/index-docs.mjs",
+    "rag:search": "node scripts/rag/search-docs.mjs",
     "database:backup:oss": "node scripts/database-backup-to-oss.mjs"
   },
   "dependencies": {