feat: 添加旧版插件兼容测试及相关配置文件

test_plugin/old/plugin.yaml

@@ -0,0 +1,24 @@
+_schema_version: 2
+name: astrbot_plugin_helloworld
+display_name: HelloWorld 插件
+desc: 一个简单的问候插件示例
+author: Soulter
+version: 0.1.0
+runtime:
+  python: "3.12"
+components: # 组件列表，将支持自动生成
+  - class: commands.hello:HelloCommand
+    type: command
+    name: hello
+    description: 发送问候消息
+    subcommands:
+      - name: wow
+        description: 发送 "Hello, Astrbot!" 消息
+  # - class: handlers.tools.echo:EchoTool
+  #   type: llm_tool
+  #   name: echo_tool
+  #   description: 回显输入的消息
+  # - class: handlers.listeners.echo:EchoListener
+  #   type: listener
+  #   name: message_logger
+  #   description: 监听并记录所有消息