new URL() assets tests

Assets can be referenced inline with the standard new URL('./path', import.meta.url) syntax.

It should return the asset URL, including on the server (SSR): the IdealImage and SVGR plugins must not transform those assets.

JSX​

• Small image (inlined as data URL):
• Large image (emitted as file):
• Large image with the @site alias:
• SVG image (not transformed into a React component):
• PDF file link

MDX​

• Small image:
• Large image:
• Large image with the @site alias:
• SVG image:

• PDF file link