This makes it consistent with other hubs.
See: https://github.com/pybricks/support/issues/848
The IMU section was not included in V3.1 so it is not a breaking change,
but we add a versionchanged comment just in case.
Previously, all renders were created and added manually when a newly
supported device was added to the documentation.
This commit revisits all diagrams by creating them using a single
LDRAW multi-file part model and LPUB3D building instructions file.
This makes perspective and resolution consistent across all images, and
we could update them all at once if needed.
It also removes the background from all images so they can be used
with different documentation themes.
The doc/api is a legacy name, which is confusing in the current use, since all build targets are now APIs.
Today we have:
doc/common: Common configuration and settings between all targets.
doc/main: Main Pybricks documentation at docs.pybricks.com.
doc/ide: Documentation shipped with the Pybricks Code IDE.