Add initial Microsoft Teams support

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

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

@@ -0,0 +1,23 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// ContactFolder undocumented
+type ContactFolder struct {
+	// Entity is the base model of ContactFolder
+	Entity
+	// ParentFolderID undocumented
+	ParentFolderID *string `json:"parentFolderId,omitempty"`
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// WellKnownName undocumented
+	WellKnownName *string `json:"wellKnownName,omitempty"`
+	// SingleValueExtendedProperties undocumented
+	SingleValueExtendedProperties []SingleValueLegacyExtendedProperty `json:"singleValueExtendedProperties,omitempty"`
+	// MultiValueExtendedProperties undocumented
+	MultiValueExtendedProperties []MultiValueLegacyExtendedProperty `json:"multiValueExtendedProperties,omitempty"`
+	// Contacts undocumented
+	Contacts []Contact `json:"contacts,omitempty"`
+	// ChildFolders undocumented
+	ChildFolders []ContactFolder `json:"childFolders,omitempty"`
+}