Add N-API generator support to the CLI.

src/CLI/CLI.cs

@@ -219,6 +219,9 @@ namespace CppSharp
                 case "cpp":
                     options.Kind = CppSharp.Generators.GeneratorKind.CPlusPlus;
                     return;
+                case "napi":
+                    options.Kind = CppSharp.Generators.GeneratorKind.NAPI;
+                    return;
                 case "qjs":
                     options.Kind = CppSharp.Generators.GeneratorKind.QuickJS;
                     return;

src/CLI/Generator.cs

@@ -223,6 +223,8 @@ namespace CppSharp
                     return "C++/CLI";
                 case GeneratorKind.CSharp:
                     return "C#";
+                case GeneratorKind.NAPI:
+                    return "N-API";
                 default:
                     return kind.ToString();
             }