Add initial Microsoft Teams support

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

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

@@ -0,0 +1,23 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// Policy undocumented
+type Policy struct {
+	// DirectoryObject is the base model of Policy
+	DirectoryObject
+	// AlternativeIdentifier undocumented
+	AlternativeIdentifier *string `json:"alternativeIdentifier,omitempty"`
+	// Definition undocumented
+	Definition []string `json:"definition,omitempty"`
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// IsOrganizationDefault undocumented
+	IsOrganizationDefault *bool `json:"isOrganizationDefault,omitempty"`
+	// KeyCredentials undocumented
+	KeyCredentials []KeyCredential `json:"keyCredentials,omitempty"`
+	// Type undocumented
+	Type *string `json:"type,omitempty"`
+	// AppliesTo undocumented
+	AppliesTo []DirectoryObject `json:"appliesTo,omitempty"`
+}