Hook up the WIL fallback error tracer in Terminal (#7864)

This pull request introduces (a very, very stripped-down copy of) the
WIL fallback error reporter.

It emits error records, usually immediately before the application
implodes, into the event stream.

This should improve diagnosability of issues that take Terminal down,
and allow us to give out a .wprp file to gather traces from users.

.github/actions/spell-check/expect/expect.txt

@@ -998,6 +998,7 @@ hpj
 hpp
 HPR
 HPROPSHEETPAGE
+HProvider
 HREDRAW
 hresult
 HRSRC