feat: onedrive source

[nicoloboschi]

• New agent source ms365-onedrive-source
  example usage:

 - type: "ms365-onedrive-source"
                                    id: "step1"
                                    configuration:
                                        ms-client-id: CLIENT_ID
                                        ms-client-secret: SECRET
                                        ms-tenant-id: TENANT
                                        users: "your-principal-email"
                                        path-prefix: /MyDocuments
                                        state-storage: s3
                                        state-storage-s3-bucket: "test-state-bucket"
                                        state-storage-s3-endpoint: "%s"
                                        deleted-objects-topic: "deleted-objects"
                                        idle-time: 1

to configure the credentials you need to create a registered application (this guide is helpful).

notes:

1. Auth is only supported via client secret (no delegated users or client certificates)
2. Shared drives are not supported
3. It gets files from the configured users principals. Since the authentication is done via app credentials, the "current user" drive is not accessible from UI so it makes no sense to use it.