Updates the guide for writing `ng add` schematics to include the new authoring utilities. I've also removed the `NodePackageInstallTask` because it's redundant.
PR Close#50667
The purpose of the changes is to clean all markdown to match a single pedantic style.
* To ensure all changes in style are properly separated.
* To ensure all styled content aligns to nearest 4-character-tab.
* To ensure all code blocks use the Angular `<code-example>` or `<code-tab>` elements.
* To ensure all markdown exists outside of html tags.
* To ensure all images use the Angular style for `<img>` elements.
* To ensure that all smart punctuation is replaced or removed.
```text
’, ’, “, ”, –, —, …
```
* To ensure all content does not conflict with the following reserved characters.
```text
@, $, *, &, #, |, <, >,
```
* To ensure all content displays using html entities.
The following changes were made to files in the following directory.
```text
aio/content
```
The target files were markdown files.
The list of excluded files:
```text
.browserslistrc, .css, .conf, .editorconfig, .gitignore, .html, .js, .json, .sh, .svg, .ts, .txt, .xlf,
```
PR Close#45325
Use the cross-platform `copyfiles` package instead of using `cp` which fails on Windows machines when copying files in the `postbuild` script of the "schematics-for-libraries" example.
PR Close#30966
Addresses small typos such as extra whitespaces.
This change was extracted from #29505.
This change was extracted from #29505.
This change was extracted from #29505.
PR Close#37753