Retrieval API implementation

[mgwojciech]

Added support for using MS Graph API Copilot Retrieval API
#1741

[pkbullock]

Hey @mgwojciech, can you expand to include the docs for this please? To give examples of how to use and permissions, id use other areas as an example of documentation standard.

[mgwojciech]

Sure thing. I wanted to verify first if everything is technically sounds. If that the case I will add the docs

[pkbullock]

Awesome stuff! I have been testing this.

For the retrieval API, this looks good and can retrieve results (once I remembered to setup the tests lol).

The test when in non-mocking setup, would only work though for your setup (mocking will be fine of course), just wondering if you should add comments or code to setup the test for the next person working on this can ensure it passes when not mocking.

There is a pattern of sync/async methods in other endpoints we have covered e.g. SharePoint, wondering if this too should align too?