This updates `scripts/remote_tests_{rust,python}.sh`.
The scripts were previously used to run tests
from CI on remote faster machine,
but they are still usable to run tests remotely
e.g. from a laptop that is on battery.
To preview the docs, run:
```
scripts/build-python-docs.sh
firefox dist/html/index.html
```
I have removed the Makefile because modern Sphinx Makefile is just a
wrapper for `sphinx-build -M`:
3596590317/sphinx/templates/quickstart/Makefile.new_t
and sphinx-quickstart even has an option `--no-makefile`.
`make.bat` makes even less sense.
In `scripts/build-python-docs.sh` I use `sphinx-build` directly
without `make` wrapper.
Remove unused docker-doxygen Dockerfile.
Switch scripts/run-doxygen.sh from bash to sh.
Use docker.io/alpine image instead of unsupported hrektts/doxygen