Add remote pipx install in readme

[juleaume]

Cloning the repo is not mandatory to use pipx, especially if you don't care about contributing

[cyberrumor]

Oh cool, I didn't know you could do this. I'll probably follow up with just making this default. If you're contributing, you're probably using something besides pipx anyway. E.g.,

python3 -m venv .venv
. .venv/bin/activate
pip3 install -r requirements.txt
pip3 install . --force-reinstall

Thanks!