Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/ListItemModel.go

@@ -0,0 +1,23 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// ListItem undocumented
+type ListItem struct {
+	// BaseItem is the base model of ListItem
+	BaseItem
+	// ContentType undocumented
+	ContentType *ContentTypeInfo `json:"contentType,omitempty"`
+	// SharepointIDs undocumented
+	SharepointIDs *SharepointIDs `json:"sharepointIds,omitempty"`
+	// Activities undocumented
+	Activities []ItemActivityOLD `json:"activities,omitempty"`
+	// Analytics undocumented
+	Analytics *ItemAnalytics `json:"analytics,omitempty"`
+	// DriveItem undocumented
+	DriveItem *DriveItem `json:"driveItem,omitempty"`
+	// Fields undocumented
+	Fields *FieldValueSet `json:"fields,omitempty"`
+	// Versions undocumented
+	Versions []ListItemVersion `json:"versions,omitempty"`
+}