feat: 新增脚手架/开发模式/权限白名单/system-monitor插件

- nebula create mod/key/list-templates 模组脚手架
- nebula dev 开发模式热重载
- manifest permissions.imports 权限白名单机制
- system-monitor 系统监控仪表盘插件
- 默认端口统一为 10086
- 修复 _init_nbpf 误读 Ed25519 私钥为 RSA 的 bug
- 更新 README.md 文档

oss/templates/mod/manifest.json

@@ -0,0 +1,22 @@
+{
+  "name": "@{{ author }}/{{ mod_name }}",
+  "version": "0.1.0",
+  "description": "{{ description }}",
+  "author": "{{ author }}",
+  "license": "MIT",
+  "type": "{{ mod_type }}",
+  "main": "main.py",
+  "enabled": true,
+  "priority": 999,
+  "runtime": {
+    "language": "python",
+    "entry_point": "main.py",
+    "requirements": []
+  },
+  "capabilities": [],
+  "services": {
+    "provides": [],
+    "consumes": []
+  },
+  "config": {}
+}