Description: Introducing a beautiful new metrics library with an entry point in the left-nav, a detailed metrics page where you can explore the metric with a visualization and rich metadata, and easy access to experiment workflows :test_tube: :chart_with_upwards_trend:

Why: Our customers measure the growth of their business through metrics (though they can go by many names, like OKRs or KPIs). But today, these core metrics are either hidden away in the OMC, saved as charts and lost in a sea of content, or used in experiment but disconnected from the rest of the platform. With this release, customers can now better define, manage and take action on their their metrics using full platform capabilities.

• For the analyst/PM/marketer we have a consumer-friendly experience for viewing and exploring metrics with key property breakdowns. Actions like experimentation are front-and-center
• For the data admin, we have long-awaited governance functionality like detailed history logs and rich, sortable "used by" metadata on every metric