Add initial Microsoft Teams support

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

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

@@ -0,0 +1,23 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// ShiftActivity undocumented
+type ShiftActivity struct {
+	// Object is the base model of ShiftActivity
+	Object
+	// IsPaid undocumented
+	IsPaid *bool `json:"isPaid,omitempty"`
+	// StartDateTime undocumented
+	StartDateTime *time.Time `json:"startDateTime,omitempty"`
+	// EndDateTime undocumented
+	EndDateTime *time.Time `json:"endDateTime,omitempty"`
+	// Code undocumented
+	Code *string `json:"code,omitempty"`
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// Theme undocumented
+	Theme *ScheduleEntityTheme `json:"theme,omitempty"`
+}