Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// ImageInfo undocumented
+type ImageInfo struct {
+	// Object is the base model of ImageInfo
+	Object
+	// IconURL undocumented
+	IconURL *string `json:"iconUrl,omitempty"`
+	// AlternativeText undocumented
+	AlternativeText *string `json:"alternativeText,omitempty"`
+	// AlternateText undocumented
+	AlternateText *string `json:"alternateText,omitempty"`
+	// AddImageQuery undocumented
+	AddImageQuery *bool `json:"addImageQuery,omitempty"`
+}