[DOCS]: Update getting started docs with info on winrt / COM threading

[Psychlist1972]

URL of the docs page with the problem

https://microsoft.github.io/MIDI/developer-how-to/how-to-bootstrap-windows-midi-services.html

Bug Description

See issue #607 . Add additional information on how to initialize the thread, and the limitations/benefits of the two primary approaches.

Additional notes

No response

[Psychlist1972]

Now available here
https://microsoft.github.io/MIDI/kb/threading-and-initialization/

and
https://microsoft.github.io/MIDI/kb/what-is-sdk-initialization-doing/