NF: add an IDE help

[Arthur-Milchior]

I had some troubles using IntelliJ to work with the code examples. I thus added a page that tries to help the user getting the best out of their IDE with this book.

Some of the solution are not IntelliJ specific, so I separated this page into a general purpose help and a section that concern specific IDE.

Since I only use IntelliJ, I can't provide section for Code, for examples. So, I invited users of other IDE to contribute.

Ideally, I'd love for someone to get how to use the debugger with the IDE too. However, even if this page is not perfect, I believe it may still be an improvement for the next reader

[rust-highfive]

r? @andre-richter

(rust-highfive has picked a reviewer for you, use r? to override)

[eldruin]

Thanks for the suggestion.
Here some improvements / corrections.

@hargoniX could you also check on this? especially the part about removing dependencies/features

[BartMassey]

There's some grammar that needs a bit of cleaning up here: can provide specifics on request.

After that, this should be merged.

[eldruin]

@BartMassey a more in-depth review would indeed be welcome.

[BartMassey]

I had missed this commit. Looks great now.

[eldruin]

Thank you!