* remove global npm install of create-next-app
* add npx to create-next-app command in examples
* add bash to shell snippets
* add yarn create to next-app command in examples
* fix READMEs named with lowercase
* change READMEs to use UPPERCASE
Got this fix from issue #2302. Libraries like `font-awesome` are pretty common. Indicating how to get them to work should be indicated in the `README.md` (if not added to the example)
* with-global-stylesheet without relative paths and with node_modules
* a parenthetical remark about material-components-web not being part of the example