Add initial Microsoft Teams support

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

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

@@ -0,0 +1,15 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// CalendarSharingMessageAction undocumented
+type CalendarSharingMessageAction struct {
+	// Object is the base model of CalendarSharingMessageAction
+	Object
+	// Importance undocumented
+	Importance *CalendarSharingActionImportance `json:"importance,omitempty"`
+	// ActionType undocumented
+	ActionType *CalendarSharingActionType `json:"actionType,omitempty"`
+	// Action undocumented
+	Action *CalendarSharingAction `json:"action,omitempty"`
+}