[Bug] move-native is not formatted correctly

[brson]

It's not part of the workspace and doesn't end up examined by cargo xfmt.

Reformat it and add the correct command to CI.

[nvjle]

Will xlint and xclippy also run?

[brson]

xlint already seems to run against it, probably because it is a custom program that ignores the workspace.

We can also run clippy on it in CI.

I don't know offhand how to run xfmt and xclippy on it - i was just thinking of running regular cargo fmt, but I'll look into what it would take to run the custom ones.

I know adding it to the workspace has been difficult in the past because being a cdylib causes some strange problems, but I have an idea of how it might be added to the workspace by not declaring it a cdylib (but still compiling it as one for production and tests).