Add initial Microsoft Teams support

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

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

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// ContentProperties undocumented
+type ContentProperties struct {
+	// Object is the base model of ContentProperties
+	Object
+	// Extensions undocumented
+	Extensions []string `json:"extensions,omitempty"`
+	// Metadata undocumented
+	Metadata *ContentMetadata `json:"metadata,omitempty"`
+	// LastModifiedDateTime undocumented
+	LastModifiedDateTime *time.Time `json:"lastModifiedDateTime,omitempty"`
+	// LastModifiedBy undocumented
+	LastModifiedBy *string `json:"lastModifiedBy,omitempty"`
+}