feat: deno add [package] --npm / deno install [package] --npm

[ryuapp]

JavaScript library documents often provide a way to install the libraries as described following:

npm install rehype-stringify remark-parse remark-rehype unified

// ref: https://unifiedjs.com/learn/guide/using-unified/

Doing the same thing in Deno looks like this:

deno install npm:rehype-stringify npm:remark-parse npm:remark-rehype npm:unified
// or
deno add npm:rehype-stringify npm:remark-parse npm:remark-rehype npm:unified

Some helpful documentation describes how to do it with Deno, but not all. To add npm prefixes for all libraries is very tedious.
Therefore, it would be convenient if we could specify bulk installation by adding an argument like --npm.

deno install rehype-stringify remark-parse remark-rehype unified --npm

This makes copy and paste installation easier.

[ryuapp]

• feat(add/install): --npm and --jsr flags for deno add/install #28666