[prettierx] provide the additional formatting options in a prettier plugin

[brody4hire]

as documented in https://prettier.io/docs/en/plugins.html#printers

This idea should make it easier to integrate with existing eslint plugins and other existing tools.

P.S. An interesting question on this subject asked in prettier/prettier#5747.

[brody4hire]

I think the ultimate design would be a pipeline-based toolset which uses the Acorn parser data structure, which seems to be how Babel JS works. I really like the general design of remark (https://remark.js.org/), which does Markdown processing in a set of plugins and is based on unifiedjs (https://unified.js.org/).

A step further may be to use a Flow Based Programming paradigm, like they did in noflo/noflo-jekyll (see this article and duplicate article on dzone).

[brody4hire]

I made a couple of Prettier plugins that can use this formatter, with the new formatting options in this package from a configuration file:

• https://github.com/brodybits/prettier-plugin-prettierx-babel - uses Babel JavaScript parser with enhanced estree printer from this package
• https://github.com/brodybits/prettier-plugin-prettierx-typescript - uses TypeScript parser with enhanced estree printer from this package

Next step: support using Babel parser with TypeScript, as proposed in prettier/prettier#6400

I suggested in idea in prettier/prettier#6888 to support use of the standard (Microsoft) TypeScript implementation by moving it out to a plugin, rather than bundling it with Prettier itself. (As I said in #48, I do not bundle TypeScript parser with this package anymore.) Next step would be to demonstrate using Babel TypeScript parser from a plugin.

[brody4hire]

New Prettier plugin working with both Babel & TypeScript: https://github.com/brodybits/prettier-plugin-x

This project shows eslint, Prettier, eslint-config-standard for "Standard JS" formatting, and prettier-plugin-x with prettierx formatting options all working together: https://github.com/brodybits/react-native-module-init

Documentation needs to be updated.