feat: Restore webContents navigation history and page state (#45583)

* feat: Working navigationHistory.restore with just title/url

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* feat: Restore page state, too

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* chore: Docs, lint, tests

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* Implement feedback

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* More magic

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* Make _awaitNextLoad truly private

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* Implement API group feedback

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* One more round of feedback

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Felix Rieseberg <fr@makenotion.com>

docs/api/structures/navigation-entry.md

@@ -2,3 +2,6 @@
 
 * `url` string
 * `title` string
+* `pageState` string (optional) - A base64 encoded data string containing Chromium page state
+  including information like the current scroll position or form values. It is committed by
+  Chromium before a navigation event and on a regular interval.