updates install instructions

[billbrod]

Following @NickleDave's point in #238 , tells people to run pip install -e .[dev] as the default for local install, since they'll probably want the tests.

Also wraps the install target in quotes when including optional dependencies, which is necessary for zsh.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

[BalzaniEdoardo]

I left mostly very minor comments I had after going through the install notes once again.

In general this are very good instruction, my points were almost all directed to streamlining the instructions by either "moving extra information in admonitions" or "moving content in a dedicated page".

The extra content you are adding, like explaining the editable mode, is valuable, but could make the core of the instruction a bit verbose; so I would keep the content, but as an optional side note.

[billbrod]

I agree with your points, went ahead and made those changes. Let me know what you think!

For now, I moved the jupyter content to a separate file; I'm going to do a bit of restructure of the docs soon, so exactly how things are arranged will change, but I agree it's separate.

[BalzaniEdoardo]

all good!