Implements reliable auto-expand and auto-scroll behavior for the Actions
logs view.
* Expands running or unfinished steps automatically.
* Smoothly scrolls to the latest log line during execution.
* Controlled via existing “Always auto-scroll” and “Expand running
steps” options.
Fixes#35570.
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
1. make it able to "force reload", then the previous pending request
won't block the new request
2. make it support `::group::`
3. add some TS types (but there are still many variables untyped, this
PR is large enough, the remaining types could be added in the future)
