[SharePoint API]: Decorate traffic guidance

Source: https://learn.microsoft.com/en-us/sharepoint/dev/general-development/how-to-avoid-getting-throttled-or-blocked-in-sharepoint-online#how-to-decorate-your-http-traffic

> Well-decorated traffic will be prioritized over traffic that isn't properly decorated.

We should provide guidance when requests are sent that do not use a recommended user agents strings.