Generate in a temp directory and use `rsync -rc` to only update rst files that have changed. This prevents sphinx from having to re-generate every cmd/cell page any time the git sha changes.
Also change cmd gen to match.
`-W --keep-going` will build everything but raise an error on any warnings. Should mean that github actions will correctly flag a failure when attempting to build docs. Including this current commit until the `internal_stats` command gets a help message.
Swap `cp -u` for `rsync -t`.
Drop the workaround to get the list of dot files after copying them, and instead just run the makefile twice.
Swap `$(wildcard **/*.x)` for `$(shell find . -name *.x)`,