According to MDN, inline script tags should not have defer/async attributes. But
some do. This ignores those attributes for inline script tags.
(Previously, we were only half ignoring them. We were treating them as inline,
but flagging them as deferred or async, which was causing issues with cleanup)
Fixes: https://github.com/lightpanda-io/browser/issues/1014
Fix events.get_timeStamp (was events.get_timestamp, wrong casing).
Rename `newRunner` to `htmlRunner`.
move tests to src/tests (from src/browser/tests). src/runtime and possibly other
parts might want to have html tests too.
