feat(binding): add scroll action and result handling for python binding

[NtskwK]

Power by Claude Opus 4.5

Summary by Sourcery

在 Python 绑定中新增对 Scroll 动作的支持，并定义其对应的结果类型。

新功能：

• 在 Python 绑定的动作定义中加入一个新的 Scroll 动作枚举值。
• 定义 ScrollActionResult 数据类，用于携带水平和垂直滚动偏移量。
• 扩展动作到结果类型的映射，以便为 Scroll 动作包含新的 ScrollActionResult。

Original summary in English

Summary by Sourcery

Add support for a new Scroll action in the Python binding and define its corresponding result type.

New Features:

• Introduce a Scroll action enum value in the Python binding action definitions.
• Define a ScrollActionResult dataclass carrying horizontal and vertical scroll offsets.
• Extend the action-to-result type mapping to include the new ScrollActionResult for Scroll actions.

[sourcery-ai]

嗨，我已经检查过你的更改了，看起来很棒！

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Original comment in English

Hey - I've reviewed your changes and they look great!

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[NtskwK]

#1011 用ai糊了一个

[overflow65537]

#1011 用ai糊了一个

能跑