Add `content` to `Script` media asset

[Johannes Maron]

This is a follow-up to #35886

I noticed that the Script does support any attribute, but not a content or innerHTML.

Currently:

element_template = '<script src="{path}"{attributes}></script>'

Better:

element_template = '<script{attributes}>{content}</script>'

You might want to just drop a import "#myPackage" inside the script tag, to lead a file from your importmap.

This would look something like:

Script(type="module", content="import 'myPackage'")

This is going to complicate the path-based sorting I implemented back in the day. But I believe the path can be swapped for content without much trouble.