Layout Header/Footer/Sidebar Slot Extension

We have layouts for browsing and visualizing collection items in different ways, but it would be nice to have open-ended options for injecting more information/tools there. Some initial ideas: • Chart — A configurable chart that updates based on the current filtered data. Perhaps reusing Insight panels? • Video Player — A sticky header for playing videos would turn Directus into YouTube. • Audio Player — A sticky footer would turn Directus into an audio player • Aggregate Data Footer — Could display different aggregate functions (SUM, MAX, MIN, etc) for each column. Not sure if this makes sense for layouts other than Table... perhaps we look to scope these to Layouts like interfaces to types? 🤔 • Activity / Time Series — Similar to chart, this could show activity based on a date/time field. • Item Preview / Edit — Could open a header (or sidebar?) for viewing the selected item inline. Instead of opening the Item Page/Drawer, this would keep…