* First draft of a README for the principles/ directory.
* More closely mirror the relevant section from the goals doc.
* Reword bit about excluding using chandlerc@'s suggested text.
* Link to goals doc.
* Update docs/project/principles/README.md
Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>