Refactor move docs (#8108)

* feat: [skip] generate readme script

* docs: [skip ci] update READMEs

* docs: [skip ci] fix code block type

* chore: [skip ci] move generator script

packages/babel-plugin-transform-new-target/README.md

@@ -1,104 +1,19 @@
 # @babel/plugin-transform-new-target
 
-This plugins allows babel to transform `new.target` meta property into a
-(correct in most cases) `this.constructor` expression.
+> Transforms new.target meta property
 
-## Example
+See our website [@babel/plugin-transform-new-target](https://new.babeljs.io/docs/en/next/babel-plugin-transform-new-target.html) for more information.
 
-```js
-function Foo() {
-  console.log(new.target);
-}
+## Install
 
-Foo(); // => undefined
-new Foo(); // => Foo
-```
-
-```js
-class Foo {
-  constructor() {
-    console.log(new.target);
-  }
-}
-
-class Bar extends Foo {
-}
-
-new Foo(); // => Foo
-new Bar(); // => Bar
-```
-
-### Caveats
-
-This plugin relies on `this.constructor`, which means `super` must
-already have been called when using untransformed classes.
-
-```js
-class Foo {}
-
-class Bar extends Foo {
-  constructor() {
-    // This will be a problem if classes aren't transformed to ES5
-    new.target;
-    super();
-  }
-}
-```
-
-Additionally, this plugin cannot transform all `Reflect.construct` cases
-when using `newTarget` with ES5 function classes (transformed ES6 classes).
-
-```js
-function Foo() {
-  console.log(new.target);
-}
-
-// Bar extends Foo in ES5
-function Bar() {
-  Foo.call(this);
-}
-Bar.prototype = Object.create(Foo.prototype);
-Bar.prototype.constructor = Bar;
-
-// Baz does not extend Foo
-function Baz() {}
-
-Reflect.construct(Foo, []); // => Foo (correct)
-Reflect.construct(Foo, [], Bar); // => Bar (correct)
-
-Reflect.construct(Bar, []); // => Bar (incorrect, though this is how ES5
-                            // inheritience is commonly implemented.)
-Reflect.construct(Foo, [], Baz); // => undefined (incorrect)
-```
-
-## Installation
+Using npm:
 
 ```sh
-npm install --save-dev @babel/plugin-transform-new-target
+npm install --save @babel/plugin-transform-new-target
 ```
 
-## Usage
-
-### Via `.babelrc` (Recommended)
-
-**.babelrc**
-
-```json
-{
-  "plugins": ["@babel/plugin-transform-new-target"]
-}
-```
-
-### Via CLI
+or using yarn:
 
 ```sh
-babel --plugins @babel/plugin-transform-new-target script.js
-```
-
-### Via Node API
-
-```javascript
-require("@babel/core").transform("code", {
-  plugins: ["@babel/plugin-transform-new-target"]
-});
+yarn add --save @babel/plugin-transform-new-target
 ```