Configure devcontainer "features" system/user wide rather than per workspace

[PureTryOut]

I want to install some devcontainer "features" (terrible name to search for...) into any workspace/devcontainer I use without bothering my colleagues with it (for example installing the Fish shell). With VSCode I can do that by adding an dev.containers.defaultFeatures array into the user-wide settings.json but I'm unsure how to accomplish the same with DevPod. I found a ~/.devpod/config.yaml but there seems to be no documentation on what can be added into that file so I'm unsure if it's possible that way.

Is it possible to configure certain devcontainer "features" globally rather than per-workspace?