This updates the pull request from here
https://github.com/servo/servo/pull/32553 that looks to be dormant. The
main change is that I've switched out `reflector` with `document` based
off this suggestion
https://github.com/servo/servo/pull/32553#issuecomment-2179568743, and
the `GetLocation` and `SupportedPropertyNames` methods pass through the
values from `Document`.
The implementation details are otherwise the same as the original PR
Testing: I don't see any WPT tests for this feature, I could make a
custom test if desired
Fixes: https://github.com/servo/servo/issues/32536
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Signed-off-by: Leo Ring <leoring03@gmail.com>
