Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// WorkbookChartTitle undocumented
+type WorkbookChartTitle struct {
+	// Entity is the base model of WorkbookChartTitle
+	Entity
+	// Overlay undocumented
+	Overlay *bool `json:"overlay,omitempty"`
+	// Text undocumented
+	Text *string `json:"text,omitempty"`
+	// Visible undocumented
+	Visible *bool `json:"visible,omitempty"`
+	// Format undocumented
+	Format *WorkbookChartTitleFormat `json:"format,omitempty"`
+}