Rule Insights Dashboard for repositories and organizations [GA]

### Value Prop
The Rule Insights Dashboard is now generally available, giving enterprise governance and compliance teams a single place to monitor rule evaluation and adherence across every repository in their organization. You can filter by custom properties, view aggregated metrics, export data to CSV, and access everything programmatically through the REST API — no more stitching together reports repository by repository. Whether you're auditing a single repo or reporting across thousands, you get consistent, reliable visibility in one experience.

### Expected Outcome
Enterprise teams can now track and report on rule adherence at organization scale with confidence, replacing manual, fragmented workflows with a unified dashboard purpose-built for governance. Bringing the repository dashboard to general availability and adding the new org-wide view means compliance teams spend less time aggregating data and more time acting on it. The result is faster, more accurate reporting that scales with the size and complexity of your organization.

该 issue 描述了一个面向普遍使用的 Rule Insights Dashboard，支持组织范围视图、自定义属性筛选器、CSV 导出和 REST API 访问，但没有指出任何仓库文件、测试或实现入口。首先定位 dashboard 和 API 项目；当仓库和组织级别的规则遵循报告能够大规模支持所列功能时，工作即告完成。

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