Cookbook: migration from mdBook to rustdoc

[noritada]

This PR migrates the "cookbook" documentation from mdBook to rustdoc.

Considerations

After considering the following pros and cons for each of mdBook and rustdoc, I have decided to move to rustdoc.

• mdBook

  • Pros
  • Syntax highlighting works for non-Rust code
  • Can be written directly in Markdown
  • Cons
  • Cannot validate code with cargo test, which may cause deviations from the actual APIs, especially while the APIs change frequently.
  • Need to deploy in a separate location and in a separate operation from the API documentation

• rustdoc

  • Pros
  • Code can be verified by cargo test, so no code that does not work will be left behind
  • Can be deployed together with API documentation
  • Cons
  • Syntax highlighting does not work for non-Rust code
  • Markdown formatting must be enclosed in Rust doc comments

Thanks

Thanks to rust-csv's tutorial and cookbook, which gave me good references.