Add initial Microsoft Teams support

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

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

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// TeamsApp undocumented
+type TeamsApp struct {
+	// Entity is the base model of TeamsApp
+	Entity
+	// ExternalID undocumented
+	ExternalID *string `json:"externalId,omitempty"`
+	// Name undocumented
+	Name *string `json:"name,omitempty"`
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// DistributionMethod undocumented
+	DistributionMethod *TeamsAppDistributionMethod `json:"distributionMethod,omitempty"`
+	// AppDefinitions undocumented
+	AppDefinitions []TeamsAppDefinition `json:"appDefinitions,omitempty"`
+}