Support for converting <nuxt-img> and <nuxt-picture> into <amp-img> on AMP pages

[draganovik]

Use case

• Using Nuxt Image in project together with amp-module.

Expected behavior

• If <nuxt-image> is a component on configurated AMP page, then <nuxt-image> should be deployed as <amp-img> instead of <img> tag.

Posible solution

• Tap into Nuxt Image to override <nuxt-image> component rendering
• Convert <img> to <amp-img> on AMP pages by default
• Automatically convert all base HTML tags to AMP equivalents (This might fundamentally change amp-module)