Outdated/wrong documentation

Problem/Motivation

Following the information for subtheming on a fresh drupal 10 install nothing is like it says. There is no static/sass, it is now scss.
npm install gives tons of errors. The links in *.libraries.yml are wrong.

Steps to reproduce

Installing and creating a subtheme on a fresh drupal 10 installation.

Proposed resolution

Update docs.

Remaining tasks

User interface changes

API changes

Data model changes