Add alternative result macros

[mochaaP]

There are many result code families alongside HRESULT and NTSTATUS, and some of them don't map nicely to HRESULT or NTSTATUS.

To name a few: CONFIGRET, MI_Result, SCESTATUS, ...
You can search most of them using _Return_type_success_.

What's the support policy on those alternative status codes?

[dunhor]

While I'm not familiar enough with all of the error code types, I'll give the generic statement that there's a cost/benefit for adding each new error type. It might be tricky to follow since that change includes other unrelated changes, but I'd encourage you to look at #147 to see what changes were needed to add support for NTSTATUS values. It's unlikely that any other error/status code type is popular and wide-spread enough that we'd do something similar for it.

[dunhor]

Closing this as not planned. If there's a specific error type that you think is deserving of first class treatment, file a separate issue w/ a proposal or a PR with suggestions for discussion.