Add the insert document button to the top toolbar of the data browsing experience. Let's use vscode-elements package where possible and follow VSCode themes.

On the document cards add the four action buttons - edit, copy, clone, and delete. We can re-use the existing commands for these we have for the context menu for documents in the tree view. The clone should open a playground with the document without an _id (the existing right click clone almost does this so we can re-use that). 

We don’t have the inline insert document editor yet, so the insert document experience can also map to playground creation for now. We already have these handlers currently on the tree view document context menu. Later when we have the insert document flow complete we will update these actions to use the new flow.

Designs: https://www.figma.com/design/QE0mDJK9hlbPK9shnQCIbG/VS-CODE--DATA-BROWSING?node-id=1749-175070&t=FgOGFa4NEDo4prqy-4