Spa Pod
This MR adds a Spa Pod API, which will be needed when implementing bindings for other languages. Note that only the API is included in the MR, and not its usage in the wireplumber library. This will be done in a separated MR.
This MR adds a Spa Pod API, which will be needed when implementing bindings for other languages. Note that only the API is included in the MR, and not its usage in the wireplumber library. This will be done in a separated MR.