Clean up package.json files in the `examples` directory:
- Add `private: true`
- Remove `version` (because they are irrelevant for packages that are not meant to be published)
- Remove `name` (because they are optional for packages that are not meant to be published, and when someone clones an example, they often rename it and the property becomes stale)
- Remove `author`
- Remove `description`
- Remove `license`
Also remove `with-dynamic-app-layout` example completely, since it does the same as `layout-component` (https://github.com/vercel/next.js/pull/27121#discussion_r668178408).
## Documentation / Examples
- [x] Make sure the linting passes
[With next 11 requiring react 17](https://nextjs.org/blog/next-11#upgrade-guide), most of the examples
need to be updated, so the following snippet updated all the examples to
a compatible react version.
```bash
cd examples/
fd -g 'package.json' | xargs sed -r -i 's/"react": ".*"/"react": "^17.0.2"/
fd -g 'package.json' | xargs sed -r -i 's/"react-dom": ".*"/"react-dom": "^17.0.2"/'
# exclude experimental react version
git checkout with-reason-relay/package.json
```
Fast Refresh doesn't appear to work with older version (16.8.x) versions of React. I was able to reproduce this via this issue https://github.com/vercel/next.js/issues/14895
I updated all examples I found of React `16.8.x` to `^16.13.1` so that future installs will auto bump to the latest minor version. Previously the pinned version was causing the lock of version.
* Added basic example for dynamic routing
* Added some basic docs for dynamic routing
* Added more docs for dynamic routing
* Used doctoc
* fixed lint issues
* Added useRouter to docs
* Removed getInitialProps examples that are only using router props
* Added useRouter to the navigation
* Small fix
* Updated to the latest dynamic routes implementation
* lint fix
* Update dynamic routing example
* Tweak dynamic routing documentation
* Make basic example basic again
* Adjust dynamic routes section
* Remove query param for dynamic routes example
* Remove old note
* Fix linting
