Initial commit: SenSu Alpha 0.2.0

- 13-service async plugin framework
- Textual TUI with CLI fallback
- Plugin hot-reload + permission system
- Web management panel (aiohttp)
- Bridge-based inter-module communication
- 10 regression tests

Fixes applied:
- PBKDF2-SHA256 auth (was plain SHA256)
- Auth bypass removed (was allow-all on fail)
- Bare excepts replaced with logged errors
- CatFramework/DreamSu -> SenSu naming unified
- ServiceManager: health checks + startup_order
- Env var credentials (SENSU_ADMIN_PASSWORD etc)

templates/plugin/permissions.yaml.template

@@ -0,0 +1,10 @@
+plugin_name: "${plugin_name}"
+permissions:
+  - "plugin.${plugin_name}.read"
+  - "plugin.${plugin_name}.write"
+  - "plugin.${plugin_name}.execute"
+
+permission_descriptions:
+  plugin.${plugin_name}.read: "读取${plugin_name}插件数据"
+  plugin.${plugin_name}.write: "写入${plugin_name}插件数据"
+  plugin.${plugin_name}.execute: "执行${plugin_name}插件操作"