refactor: remove unused hello command, echo listener, and related tools; add CLI and context enhancements

test_plugin/commands/hello.py

@@ -0,0 +1,12 @@
+from astrbot_sdk.api.components.command import CommandComponent
+from astrbot_sdk.api.event import AstrMessageEvent, filter
+from astrbot_sdk.api.star.context import Context
+
+
+class HelloCommand(CommandComponent):
+    def __init__(self, context: Context):
+        self.context = context
+
+    @filter.command("hello")
+    async def hello(self, event: AstrMessageEvent):
+        yield event.plain_result("Hello, Astrbot!")

test_plugin/plugin.yaml

@@ -0,0 +1,22 @@
+_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
+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