Add initial Microsoft Teams support

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

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

@@ -0,0 +1,23 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// AddContentHeaderAction undocumented
+type AddContentHeaderAction struct {
+	// InformationProtectionAction is the base model of AddContentHeaderAction
+	InformationProtectionAction
+	// UIElementName undocumented
+	UIElementName *string `json:"uiElementName,omitempty"`
+	// Text undocumented
+	Text *string `json:"text,omitempty"`
+	// FontName undocumented
+	FontName *string `json:"fontName,omitempty"`
+	// FontSize undocumented
+	FontSize *int `json:"fontSize,omitempty"`
+	// FontColor undocumented
+	FontColor *string `json:"fontColor,omitempty"`
+	// Alignment undocumented
+	Alignment *ContentAlignment `json:"alignment,omitempty"`
+	// Margin undocumented
+	Margin *int `json:"margin,omitempty"`
+}