New docs

- [x] Move all packages docs to /docs
- [x] Compare the changelog with the docs
- [x] Update all docs where plugin names are mentioned, plugins order needs to get new extracted plugins into the list
- [x] Update polyfills list [here](https://github.com/cssinjs/jss/blob/master/docs/setup.md#install)
- [x] Create Changelog
- [x] Default Preset should fetch all syntax files and render on one page?
- [x] Check all links after moving files

## New contents

- [x] Write v10 migration guide
- [x] Write Introduction, reduce the main readme.md
- [x] Rewrite benefits.md
- [x] CDN links
- [ ] Write tradeoffs.md
- [ ] Update pereformance.md
- [ ] Write Getting Started
- [ ] Write Hello World
- [ ] Write FAQ
- [x] Write articles.md with a list of all known articles
- [ ] Rewrite and improve or remove links to my medium articles

## Structure (inspired by react docs)

Installation
- Getting Started
- Setup
- CDN Links

Main Concepts
- Introduction
- Hello World
- Benefits
- Tradeoffs

Advanced Guides
- SSR
- CSP
- Performance
- CLI

API Reference
- Styles Syntax
- Core
- Default Preset
- JSS
- React-JSS
- Styled-JSS
- Plugins
- jss-plugin-x
- jss-plugin-y

Contributing

FAQ

Community
- Chat
- Projects
- Articles
- Courses
- Podcasts
- Examples
- Videos