Fix some IWYU issues; fix typo in README.

[hzeller]

Description

• Fix some missing includes to make things compile; it looks like there might be other instances where more diligence is needed w.r.t IWYU, but these I stumbled upon as it made the compile hick-up.
• The ninja checks in the README should really be check
• There is another typo in the README cmake --preset preferred ... the preferred preset does not actually exist. Maybe default was meant ? Anyway, not touching that, but you should probably change that to one of the existing options.

[filippobrizzi]

@hzeller Thanks a lot for your contribution! You are right, preferred is now default, I will update the readme.

After your comment, I found that there is this tool include-what-you-use (which you probably know) and I integrated it in the repo https://github.com/olympus-robotics/hephaestus/pull/99, although I still need to understand the proper configuration for it.

[hzeller]

Since you're using clang-tidy in the project, enabling the misc-include-cleaner check might already provide a bunch of detection without having to use include-what-you-use.

Also the clang layering check is helpful, there are a few options that help keeping include dependencies clean: https://maskray.me/blog/2022-09-25-layering-check-with-clang

[filippobrizzi]

Thanks for the tip misc-include-cleaner provided to be more helpful than include-what-you-use

I have enabled it for the repo and found a lot of missing includes https://github.com/olympus-robotics/hephaestus/pull/107

[hzeller]

Cool!