[Feature] Add Sharepoint datasoure

[mawandm]

Describe the solution you'd like
This feature adds Sharepoint as a datasource.

Additional context
This particularly useful for Microsoft shops

[mawandm]

@akizito See https://dev.to/nbelyh/using-a-certificate-auth-to-call-sharepoint-rest-api-csom-1gh8 on authenticating with Sharepoint using certificates. I'm suspecting this might be more reliable than refresh token exchanges that seem to be the other alternative since basic auth isn't not possible

[akizito]

ok taking a look at this