Insert image at top of Files pane

What I’m trying to do

I want to insert an image at the top of the Files pane, sort of like a logo for the vault.
Is this possible with a CSS snippet? Or would it need a plugin?
Mock-up below:

Things I have tried

The plugin Obsidian Vault Name lets you customize the vault name text at the top of the Files pane, but I’d like to add an image instead of text.