Adds Rust Under the Hood

[eventhelix]

We have added a description for the book Rust Under the Hood. We are the authors of the book.

Please accept this pull request.

Deepa Ahluwalia/Sandeep Ahluwalia

[eventhelix]

We're sorry if that wasn't clear. We had submitted it from an account named eventhelix.

It was never our intention to hide anything. We did not know that we had to disclose this information. We followed the instructions mentioned in the contributing page:

https://github.com/sger/RustBooks/blob/main/CONTRIBUTING.md

We will update this information in the PR description.

[dtolnay]

No worries. I think I would just ask @sger to consider what the role of the nonfree section of this repo is, as compared against https://www.amazon.com/s?k=rust+programming&rh=n%3A5 (Amazon search for "rust programming" in the category "Books » Computers & Technology"). Not 100% of the 500 hits have Rust as the primary topic, but I would estimate at least 200 different books there would classify as foremost a Rust book.

Amazon's value proposition for discovering Rust books includes keyword search ("rust async book"), ratings, reviews, etc.

For this repo, some level of unaffiliated personal endorsement (#57) or other community engagement (#56) would make a good bar for nonfree materials, I think. Rather than being a less-complete Amazon search.

[eventhelix]

We agree with you. Some unaffiliated community members should endorse the books before they get included in the list.

Thanks for your feedback.