[fix] 修复了使用最小pages示例时插件无法注册的bug

[xiewoc]

在使用最小pages实例时发现无对应插件页面，遂发

Modifications / 改动点

仅修改docs/zh&en/dev/star/guides/plugin-pages.md，添加了

@register(f"{PLUGIN_NAME}", "Soulter", "一个简单的 Pages 示例插件", "1.0.0", "repo url")

修改了

from astrbot.api.star import Context, Star

-->

from astrbot.api.star import Context, Star, register

• This is NOT a breaking change. / 这不是一个破坏性变更。

Screenshots or Test Results / 运行截图或测试结果

---

Checklist / 检查清单

• 😊 If there are new features added in the PR, I have discussed it with the authors through issues/emails, etc.
  / 如果 PR 中有新加入的功能，已经通过 Issue / 邮件等方式和作者讨论过。

• 👀 My changes have been well-tested, and "Verification Steps" and "Screenshots" have been provided above.
  / 我的更改经过了良好的测试，并已在上方提供了“验证步骤”和“运行截图”。

• 🤓 I have ensured that no new dependencies are introduced, OR if new dependencies are introduced, they have been added to the appropriate locations in requirements.txt and pyproject.toml.
  / 我确保没有引入新依赖库，或者引入了新依赖库的同时将其添加到 requirements.txt 和 pyproject.toml 文件相应位置。

• 😮 My changes do not introduce malicious code.
  / 我的更改没有引入恶意代码。

Summary by Sourcery

修正文档中的最小 Pages 插件示例，使其能够正确注册并展示完整的插件定义。

Bug Fixes:

• 修复英文和中文插件 Pages 文档最小示例缺少插件注册信息，导致示例插件无法正常注册的问题。

Documentation:

• 更新中英文插件 Pages 最小完整示例，补充插件注册装饰器及相关导入。

[sourcery-ai]

Hey - I've found 2 issues

Prompt for AI Agents

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="docs/en/dev/star/guides/plugin-pages.md" line_range="44-49" />
<code_context>
+Plugin backend code should use `astrbot.api.web`. Avoid exposing raw FastAPI, Starlette, or Quart request objects as the public API for your plugin business logic.
+
+```python
+from astrbot.api.star import Context, Star, register
+from astrbot.api.web import error_response, json_response, request
+
+PLUGIN_NAME = "astrbot_plugin_page_demo"
+
+@register(f"{PLUGIN_NAME}", "Soulter", "a simple example pages plugin", "1.0.0", "repo url")
+class MyPlugin(Star):
+    def __init__(self, context: Context):
</code_context>
<issue_to_address>
**nitpick:** The example explicitly uses the deprecated `register` decorator even though `Star` subclasses are auto-registered by the current framework; importing the example emits a deprecation warning, and the example will break when the decorator is removed.

**Triggers:** Whenever a user copies and imports the minimal example.

**Suggested fix:** Remove the `register` import and decorator, or clearly label the decorator as required only for older AstrBot versions.
</issue_to_address>

### Comment 2
<location path="docs/en/dev/star/guides/plugin-pages.md" line_range="49" />
<code_context>
+
+PLUGIN_NAME = "astrbot_plugin_page_demo"
+
+@register(f"{PLUGIN_NAME}", "Soulter", "a simple example pages plugin", "1.0.0", "repo url")
+class MyPlugin(Star):
+    def __init__(self, context: Context):
</code_context>
<issue_to_address>
**issue:** The copied example records the literal string `repo url` as the plugin repository; when the plugin updater uses this metadata, it has no valid repository source and update operations fail.

**Triggers:** When a user copies the example unchanged and later attempts to update the plugin.

**Suggested fix:** Use a clearly valid placeholder URL format, or omit the optional repository argument and explain that users should replace it with their actual repository URL.

```suggestion
@register(f"{PLUGIN_NAME}", "Soulter", "a simple example pages plugin", "1.0.0", "https://github.com/your-user/your-repo")
```
</issue_to_address>

Sourcery assessment

Approval pending. 1 finding to address first.

Blocking findings: docs/en/dev/star/guides/plugin-pages.md:49

---

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[xiewoc]

静待review