Consider wiring up `pkg:js_interop` types into `pkg:web`

- [ ] `JSDate` - `input.valueAsDate` - https://www.w3.org/TR/2011/WD-html5-20110405/common-input-element-attributes.html#dom-input-valueasdate - Sadly, the idl does NOT reflect this is a `Date` object. 🤷 - Ugh. I guess `Date` is no longer recommended from the W3C - https://www.w3.org/Bugs/Public/show_bug.cgi?id=22824