Icons are important to a developer's experience. Not only do they make things look nice, but you can easily recognise file types as you're wipping around your codebase easier if they icons make sense.
Visual Studio Code has awesome theme support - but it also has awesome icon theme support.
There are a number of themes out there and vscode-icons is one of the best.
To install - bring up Quick Open
ctrl-p and type
ext install vscode-icons. Find the vscode-icons package and click install. Restart the editor.
Once the editor restarts you need to enable your new icon theme. Go to File -> Preferences -> File Icon Theme, or
crtl-shift-p and type theme to search for it.