[Docs Rewrite] Create "Quick Start" page

[markerikson]

What docs page is being added or updated?

• Section: Introduction
• Page: Quick Start

For Adding New Content

What kind of content category is this page (tutorial, how-to, explanation, reference)?

The "Quick Start" page is a form of tutorial, but intended to demonstrate the "fastest" / "easiest" / "correct" way to use Redux without explaining why things work this way.

Who is the intended target audience?

Beginners who know nothing about Redux, yet.

What knowledge are we assuming they have?

• JS syntax: ES6, async/await, object spreads
• React: components, hooks
• Other: HTTP / AJAX, fetch

What are the intended results or takeaways from reading this page?

Readers should be able to mimic the demonstrated patterns to create a basic React+Redux app that does some CRUD work.

What is the most critical info they should learn?

• Redux is a tool for managing state outside of your React components
• The Redux Toolkit package is the simplest and recommended way to use Redux
• Key React+Redux APIs (configureStore, createSlice, useSelector / useDispatch)
• Immutability is vital, but either requires hand-written updates or use of RTK+Immer "magic"

Notes and Suggestions

• Need to make it as "hands-on" and interactive as possible
• Use https://jsonplaceholder.typicode.com/ as a fake but working backend. (Note: PUT / POST / DELETE don't actually change anything.)
• Add "Prerequisites" section at the start of the page. Don't waste time explaining other things here.
• Key references / examples:
  • https://www.apollographql.com/docs/react/get-started/#apollo-boost
  • https://www.taniarascia.com/getting-started-with-react/
  • https://www.taniarascia.com/getting-started-with-vue/
  • https://vuejs.org/v2/guide/
  • https://nextjs.org/learn/basics/getting-started
• Styling: https://taniarascia.github.io/primitive/

[markerikson]

So hey, this is done now :)