Add initial Microsoft Teams support

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

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

@@ -0,0 +1,33 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// MailFolder undocumented
+type MailFolder struct {
+	// Entity is the base model of MailFolder
+	Entity
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// ParentFolderID undocumented
+	ParentFolderID *string `json:"parentFolderId,omitempty"`
+	// ChildFolderCount undocumented
+	ChildFolderCount *int `json:"childFolderCount,omitempty"`
+	// UnreadItemCount undocumented
+	UnreadItemCount *int `json:"unreadItemCount,omitempty"`
+	// TotalItemCount undocumented
+	TotalItemCount *int `json:"totalItemCount,omitempty"`
+	// WellKnownName undocumented
+	WellKnownName *string `json:"wellKnownName,omitempty"`
+	// SingleValueExtendedProperties undocumented
+	SingleValueExtendedProperties []SingleValueLegacyExtendedProperty `json:"singleValueExtendedProperties,omitempty"`
+	// MultiValueExtendedProperties undocumented
+	MultiValueExtendedProperties []MultiValueLegacyExtendedProperty `json:"multiValueExtendedProperties,omitempty"`
+	// Messages undocumented
+	Messages []Message `json:"messages,omitempty"`
+	// MessageRules undocumented
+	MessageRules []MessageRule `json:"messageRules,omitempty"`
+	// ChildFolders undocumented
+	ChildFolders []MailFolder `json:"childFolders,omitempty"`
+	// UserConfigurations undocumented
+	UserConfigurations []UserConfiguration `json:"userConfigurations,omitempty"`
+}