Add initial Microsoft Teams support

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

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

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// WorkingHours undocumented
+type WorkingHours struct {
+	// Object is the base model of WorkingHours
+	Object
+	// DaysOfWeek undocumented
+	DaysOfWeek []DayOfWeek `json:"daysOfWeek,omitempty"`
+	// StartTime undocumented
+	StartTime *time.Time `json:"startTime,omitempty"`
+	// EndTime undocumented
+	EndTime *time.Time `json:"endTime,omitempty"`
+	// TimeZone undocumented
+	TimeZone *TimeZoneBase `json:"timeZone,omitempty"`
+}