Add project files.

MidrandBooksApi/OpenApiBearerSecuritySchemeTransformer.cs

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+namespace MidrandBooksApi;
+
+public sealed class OpenApiBearerSecuritySchemeTransformer : IOpenApiDocumentTransformer
+{
+    public async Task TransformAsync(OpenApiDocument document, OpenApiDocumentTransformerContext context, CancellationToken cancellationToken)
+    {
+        var bearerScheme = new OpenApiSecurityScheme
+        {
+            Type = SecuritySchemeType.Http,
+            Scheme = "bearer",
+            Description = "JWT Authorization header using the Bearer scheme. Example: \"Bearer {token}\""
+        };
+
+        document.AddComponent("Bearer", bearerScheme);
+    }
+}