feat: add auditing to user routes (#3961)

coderd/features/features.go

@@ -0,0 +1,13 @@
+package features
+
+import "net/http"
+
+// Service is the interface for interacting with enterprise features.
+type Service interface {
+	EntitlementsAPI(w http.ResponseWriter, r *http.Request)
+
+	// Get returns the implementations for feature interfaces. Parameter `s` must be a pointer to a
+	// struct type containing feature interfaces as fields.  The FeatureService sets all fields to
+	// the correct implementations depending on whether the features are turned on.
+	Get(s any) error
+}