In facebook#11318 a change was made to `babel-preset-react-app` to require `@babel/plugin-proposal-private-property-in-object`, but no such dependency was added to `package.json`. This fixes that mistake by adding the dependency.

Beyond just a pure migration, this also:

- Drops Node 14 usage from CI (which also removes the need for explicit
  npm 8 installs)
- Removes the "old node" test, which just checked that installing on old
  node failed. We shouldn't need to test that
- Consolidates the build & test workflows so we don't end up with
  a proliferation of workflows.

Update running-tests

Update running-tests.md

Co-authored-by: Rajhans Jadhao <rajhans.jadhao@gmail.com>

…rsion-rtl-16

fix: upgrade RTL version to avoid peer-deps mismatch

…ing a message on init (facebook#17003)

It's probably time to make this project document its status as being
deprecated and not recommended for production usage.

To change it:

- I opted to add a header to the README saying its over and you should
go look at https://react.dev/learn/start-a-new-react-project

- I left a note saying that if you are following, it is maybe worth
carrying on. While I hear react 19 doesn't work with CRA, I wouldn't be
surprised that a good chunk of tutorials would still work. Open to being
a bit more hard-lined there but there was a lot of great resources for
learning react in that era and it seems like a waste to be making people
stop early?

- I added a message inside the CLI, it shows once and says "don't use
this, use the stuff in
https://react.dev/learn/start-a-new-react-project"

---------

Co-authored-by: Ricky <rickhanlonii@gmail.com>
Co-authored-by: Rick Hanlon <rickhanlonii@fb.com>

Updates to a shortlink that we can redirect as needed for old versions.
Currently 404

- Adds a banner with deprecation notice
- Adds a noindex meta tag to home page to remove from search
- Add og meta info for when noindex is ignored

 - babel-plugin-named-asset-import@0.4.0
 - babel-preset-react-app@10.1.0
 - cra-template-typescript@1.3.0
 - cra-template@1.3.0
 - create-react-app@5.1.0
 - eslint-config-react-app@7.1.0
 - react-dev-utils@12.1.0
 - react-error-overlay@6.1.0
 - react-scripts@5.1.0