Add initial Microsoft Teams support

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

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

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// RoomList undocumented
+type RoomList struct {
+	// Place is the base model of RoomList
+	Place
+	// EmailAddress undocumented
+	EmailAddress *string `json:"emailAddress,omitempty"`
+	// Rooms undocumented
+	Rooms []Room `json:"rooms,omitempty"`
+}