feat: provide SvelteKit html typings

[dummdidumm]

This makes it possible to delete these from svelte/elements in Svelte 5 and have them controled in SvelteKit, decoupling the two
closes #10534

Don't think this is really a breaking change, but let's have it as part of 2.0 just to be sure.

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[benmccann]

just a heads up that the tests are failing

[dummdidumm]

@tcc-sejohnson / @gtm-nayan I adjusted the exlude array in the generated tsconfig as part of this PR, I removed the [!ambient.dts] line because I think it's unnecessary (and I don't know how to add non-ambient.d.ts in there 😅 ). exclude will only exclude things that were pulled in by include, and include isn't written in a way that pulls in more than those two d.ts files. Does that sound sensible to you? (Tagging you too because IIRC you both worked in this area before)

[dummdidumm]

Ok I checked whe the exclude came from, and it's there since the beginning of time, but I still don't see how it makes sense to have it like that, so I'm merging this.