[WIP]feat: 新增配置默认交互的方式，优化 G2 图表默认效果

[interstellarmt]

Checklist

• npm test passes
• benchmarks are included
• commit message follows commit guidelines
• documents are updated

Description of change

• 饼图默认应用 elementHoverScale
• 柱状图条形图默认应用elementHighlight，并且配置config: { region: true, background: true, }

[gemini-code-assist]

Summary of Changes

Hello @interstellarmt, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

此拉取请求旨在通过引入一种配置默认交互的新方式来优化 G2 图表的默认效果。它定义了一套规则，使得特定类型的图表（如饼图和柱状图）能够自动拥有预设的交互行为，从而在不进行额外配置的情况下提供更丰富的用户体验。这一改动简化了图表创建流程，并提升了开箱即用的图表表现力。

Highlights

• 新增默认交互配置: 引入了新的机制来配置 G2 图表的默认交互，通过定义规则自动应用交互效果。
• 饼图默认交互: 为饼图（interval mark + theta 坐标系）默认应用了 elementHoverScale 交互，提升用户体验。
• 柱状图默认交互: 为柱状图（interval mark + 非坐标变换）默认应用了 elementHighlight 交互，并配置了 region: true 和 background: true。
• 交互推断逻辑: 新增 inferDefaultInteractions 函数，根据 mark 类型和坐标系推断并应用默认交互，同时确保用户自定义配置的优先级更高。

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[gemini-code-assist]

Code Review

这个 PR 通过引入一个可配置的默认交互规则系统，为图表添加了默认交互，这是一个很棒的改进。特别是为饼图和柱状图/条形图增加了默认的 elementHoverScale 和 elementHighlight 交互，提升了开箱即用的体验。代码结构清晰，interaction.ts 中的逻辑易于理解和扩展。

我发现了一个潜在的严重问题，可能会导致运行时错误，并提供了一个修复建议。请查看具体的审查评论。

[gemini-code-assist]

将 config 设置为 true 会导致运行时错误。在 plot.ts 中，这个值最终会用在展开语法 { ...option } 中，而 ...true 是无效的，会抛出 TypeError。建议使用空对象 {} 代替 true 来表示使用默认配置，这样既能修正错误，也能达到预期效果。

Suggested change

	config: true,
	config: {},