Files need title in the YAML (Quarto Book Website)

[bcdavasconcelos]

For Book Websites, it is important to have each file with the title in the YAML. Currently, the title is not used in the File + ID Section Type.

Also, remember that we can create a separate file, with many includes, for the PDF generation.

[bcdavasconcelos]

Quarto now has an automatic mode for creating the sidebar, but it depends on the files having their own YAML blocks with the metadata.