#32 Provide MAPI headers in-tree

Microsoft killed the self extractor package for the `MAPI` headers as it isn't aviliable anywhere on the web. While I have a copy it was still always a pain to aquire then dump the files in whatever Windows SDK was being used at the time. So we are going to import them into the tree much like `c-c` did. Since `c-c` has been refactored it will take some experimentation to get this to work correctly so it will be in two parts minimum. Planned parts are: - Import headers to the tree - Adjust build system to use them ---- [Bug 1717088](https://bugzilla.mozilla.org/show_bug.cgi?id=1717088)