feat: Allow array of extensions for enableInputRules and enablePasteRules

[aguingand]

Context

In multiple project I wan't to enable only input / paste rules I need but there is no easy way to do it. (e.g I only want to paste links)

Feature

Allow to pass an array of extension or extension name for enableInputRules and enablePasteRules editor options:

new Editor({
  extensions: [
    StarterKit,
    Link,
  ],
  enablePasteRules: [Link],
  enableInputRules: ['horizontalRule'],
})

Comment

I will update docs if it's ok for you 👍

[philippkuehn]

Thanks!