I stumbled across the Local Scopes documentation while looking for information on the Kotlin extensions and thought I could make it a bit more clear. I also made mentioning that exceptions and errors thrown within `with-scope` an alert as I found that to be very surprising and unexpected, particularly as that seems like different behavior from `configure-scope`.

Not using a `SentryContext` when working with Sentry in a coroutine _may_ have been the cause of a bug I dealt with at work recently. Since lots of Android apps use Kotlin now, the Sentry Kotlin Extensions should be called out in the setup guides.

Local scopes are not supported on Android, but the documentation for them still shows up anyways. Conversely, information about the Kotlin extensions is missing, but many Android apps make heavy use of Kotlin and Coroutines, so this section should be displayed.

The android specific scope synchronization block was right after
the code block that demonstrated setting a user, and before the
code block that unsets a user. This made reading the documentation
confusing, so I extracted a new included page and added a new
platform section that only supports android to hold it.

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>