Add initial Microsoft Teams support

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

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

@@ -0,0 +1,21 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// Workbook undocumented
+type Workbook struct {
+	// Entity is the base model of Workbook
+	Entity
+	// Application undocumented
+	Application *WorkbookApplication `json:"application,omitempty"`
+	// Names undocumented
+	Names []WorkbookNamedItem `json:"names,omitempty"`
+	// Tables undocumented
+	Tables []WorkbookTable `json:"tables,omitempty"`
+	// Worksheets undocumented
+	Worksheets []WorkbookWorksheet `json:"worksheets,omitempty"`
+	// Comments undocumented
+	Comments []WorkbookComment `json:"comments,omitempty"`
+	// Functions undocumented
+	Functions *WorkbookFunctions `json:"functions,omitempty"`
+}