Add initial Microsoft Teams support

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

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

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// KeyValuePair undocumented
+type KeyValuePair struct {
+	// Object is the base model of KeyValuePair
+	Object
+	// Name undocumented
+	Name *string `json:"name,omitempty"`
+	// Value undocumented
+	Value *string `json:"value,omitempty"`
+}