Add initial Microsoft Teams support

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

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

@@ -0,0 +1,25 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// Notification undocumented
+type Notification struct {
+	// Entity is the base model of Notification
+	Entity
+	// TargetHostName undocumented
+	TargetHostName *string `json:"targetHostName,omitempty"`
+	// ExpirationDateTime undocumented
+	ExpirationDateTime *time.Time `json:"expirationDateTime,omitempty"`
+	// Payload undocumented
+	Payload *PayloadTypes `json:"payload,omitempty"`
+	// DisplayTimeToLive undocumented
+	DisplayTimeToLive *int `json:"displayTimeToLive,omitempty"`
+	// Priority undocumented
+	Priority *Priority `json:"priority,omitempty"`
+	// GroupName undocumented
+	GroupName *string `json:"groupName,omitempty"`
+	// TargetPolicy undocumented
+	TargetPolicy *TargetPolicyEndpoints `json:"targetPolicy,omitempty"`
+}