Add initial Microsoft Teams support

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

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

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// MediaPrompt undocumented
+type MediaPrompt struct {
+	// Prompt is the base model of MediaPrompt
+	Prompt
+	// MediaInfo undocumented
+	MediaInfo *MediaInfo `json:"mediaInfo,omitempty"`
+	// Loop undocumented
+	Loop *int `json:"loop,omitempty"`
+}