Introducing: “No-Code” Cells

Introduced three new UI-driven "no-code" cells: Pivot, Filter, and Writeback. The Pivot cell allows for aggregation and pivoting of dataframes. The Filter cell provides UI-based filtering of dataframes. The Writeback cell enables sending dataframes back to a database. All these cells generate code that can be viewed or edited, promoting learning and flexibility. Enhanced the Chart cell with new visualization types and infinite scale.