Refine Project Panel Folder Icons by Adopting VSCode's Coexisting Icon Design (Folder + Expand/Collapse Arrows)

[jiesia]

I hope the folder icon design in the Project Panel can draw inspiration from VSCode.

In VSCode, folder icons and expand/collapse arrow icons coexist. This design is highly beneficial as it allows me to easily check whether a specific folder is in an expanded state. Meanwhile, the hierarchical relationship between files and folders is also clear at a glance.

However, with Zed's current design, there are two issues:

1. When using the default setting (i.e., project_panel.folder_icons is set to true), folders only display their own icons without the expand/collapse arrow icons. This makes it difficult for me to intuitively determine if a folder is expanded.
   

2. When project_panel.folder_icons is set to false, only the expand/collapse arrow icons are shown. This not only affects the visual aesthetics but also makes it inefficient to identify the hierarchical relationship between files and folders.
   

[priosshrsth]

Any updates on this? Is there now way to show fold the caret and the folder icons?