Add initial Microsoft Teams support

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

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

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// WorkPosition undocumented
+type WorkPosition struct {
+	// ItemFacet is the base model of WorkPosition
+	ItemFacet
+	// Categories undocumented
+	Categories []string `json:"categories,omitempty"`
+	// Detail undocumented
+	Detail *PositionDetail `json:"detail,omitempty"`
+}