Docs: update Fluent API examples and add image

Update low-code Fluent API docs: add docs/en/images/quick-look.png and refactor examples to use DynamicEntityBase for entities. Remove the separate assembly registration step and replace the ConfigureServices sample with a Low-Code initializer (MyAppLowCodeInitializer) that uses AsyncOneTimeRunner and an async InitializeAsync which calls DynamicModelManager.Instance.InitializeAsync(). Also adjust step numbering and small samples to reflect these API changes (add server-only/internal property, set UI descriptors, etc.).

docs/en/low-code/fluent-api.md

@@ -16,7 +16,7 @@ C# Attributes and the Fluent API are the **recommended way** to define dynamic e
 ````csharp
 [DynamicEntity]
 [DynamicEntityUI(PageTitle = "Products")]
-public class Product
+public class Product : DynamicEntityBase
 {
     [DynamicPropertyUnique]
     public string Name { get; set; }
@@ -30,18 +30,7 @@ public class Product
 }
 ````
 
-### Step 2: Register the Assembly
-
-````csharp
-public override void ConfigureServices(ServiceConfigurationContext context)
-{
-    AbpDynamicEntityConfig.SourceAssemblies.Add(
-        new DynamicEntityAssemblyInfo(typeof(YourDomainModule).Assembly)
-    );
-}
-````
-
-### Step 3: Add Migration and Run
+### Step 2: Add Migration and Run
 
 ```bash
 dotnet ef migrations add Added_Product
@@ -50,12 +39,12 @@ dotnet ef database update
 
 You now have a complete Product management page with data grid, create/edit modals, search, sorting, and pagination.
 
-### Step 4: Add Relationships
+### Step 3: Add Relationships
 
 ````csharp
 [DynamicEntity]
 [DynamicEntityUI(PageTitle = "Orders")]
-public class Order
+public class Order : DynamicEntityBase
 {
     [DynamicForeignKey("MyApp.Customers.Customer", "Name", ForeignAccess.Edit)]
     public Guid CustomerId { get; set; }
@@ -65,7 +54,7 @@ public class Order
 }
 
 [DynamicEntity(Parent = "MyApp.Orders.Order")]
-public class OrderLine
+public class OrderLine : DynamicEntityBase
 {
     [DynamicForeignKey("MyApp.Products.Product", "Name")]
     public Guid ProductId { get; set; }
@@ -97,7 +86,7 @@ Marks a class as a dynamic entity. The entity name is derived from the class nam
 
 ````csharp
 [DynamicEntity]
-public class Product
+public class Product : DynamicEntityBase
 {
     public string Name { get; set; }
     public decimal Price { get; set; }
@@ -108,7 +97,7 @@ Use the `Parent` property for parent-child (master-detail) relationships:
 
 ````csharp
 [DynamicEntity(Parent = "MyApp.Orders.Order")]
-public class OrderLine
+public class OrderLine : DynamicEntityBase
 {
     public Guid ProductId { get; set; }
     public int Quantity { get; set; }
@@ -122,7 +111,7 @@ Configures entity-level UI. Entities with `PageTitle` get a menu item and a dedi
 ````csharp
 [DynamicEntity]
 [DynamicEntityUI(PageTitle = "Product Management")]
-public class Product
+public class Product : DynamicEntityBase
 {
     // ...
 }
@@ -215,7 +204,7 @@ Defines JavaScript interceptors on a class for CRUD lifecycle hooks:
     InterceptorType.Post,
     "context.log('Deleted: ' + context.commandArgs.entityId);"
 )]
-public class Organization
+public class Organization : DynamicEntityBase
 {
     public string Name { get; set; }
 }
@@ -245,7 +234,7 @@ Reference in an entity:
 ````csharp
 [DynamicEntity]
 [DynamicEntityUI(PageTitle = "Organizations")]
-public class Organization
+public class Organization : DynamicEntityBase
 {
     public string Name { get; set; }
     public OrganizationType OrganizationType { get; set; }
@@ -276,28 +265,38 @@ The Fluent API has the **highest priority** in the configuration system. Use `Ab
 
 ### Basic Usage
 
-Configure in your Domain module's `ConfigureServices`:
+Configure in your Low-Code Initializer (e.g. `MyAppLowCodeInitializer`):
 
 ````csharp
-public override void ConfigureServices(ServiceConfigurationContext context)
+public static class MyAppLowCodeInitializer
 {
-    AbpDynamicEntityConfig.EntityConfigurations.Configure(
-        "MyApp.Products.Product",
-        entity =>
-        {
-            entity.DefaultDisplayPropertyName = "Name";
+    private static readonly AsyncOneTimeRunner Runner = new();
 
-            var priceProperty = entity.AddOrGetProperty("Price");
-            priceProperty.AsRequired();
-            priceProperty.UI = new EntityPropertyUIDescriptor
-            {
-                DisplayName = "Unit Price",
-                CreationFormAvailability = EntityPropertyUIFormAvailability.Available
-            };
+    public static async Task InitializeAsync()
+    {
+        await Runner.RunAsync(async () =>
+        {
+            AbpDynamicEntityConfig.EntityConfigurations.Configure(
+                "MyApp.Products.Product",
+                entity =>
+                {
+                    entity.DefaultDisplayPropertyName = "Name";
+
+                    var priceProperty = entity.AddOrGetProperty("Price");
+                    priceProperty.AsRequired();
+                    priceProperty.UI = new EntityPropertyUIDescriptor
+                    {
+                        DisplayName = "Unit Price",
+                        CreationFormAvailability = EntityPropertyUIFormAvailability.Available
+                    };
+
+                    entity.AddOrGetProperty("InternalNotes").AsServerOnly();
+                }
+            );
 
-            entity.AddOrGetProperty("InternalNotes").AsServerOnly();
-        }
-    );
+            await DynamicModelManager.Instance.InitializeAsync();
+        });
+    }
 }
 ````
 
@@ -439,7 +438,7 @@ public enum OrderStatus
 // Customer entity
 [DynamicEntity]
 [DynamicEntityUI(PageTitle = "Customers")]
-public class Customer
+public class Customer : DynamicEntityBase
 {
     [DynamicPropertyUnique]
     public string Name { get; set; }
@@ -457,7 +456,7 @@ public class Customer
 // Product entity
 [DynamicEntity]
 [DynamicEntityUI(PageTitle = "Products")]
-public class Product
+public class Product : DynamicEntityBase
 {
     [DynamicPropertyUnique]
     public string Name { get; set; }
@@ -478,7 +477,7 @@ public class Product
         }
     }"
 )]
-public class Order
+public class Order : DynamicEntityBase
 {
     [DynamicForeignKey("MyApp.Customers.Customer", "Name", ForeignAccess.Edit)]
     public Guid CustomerId { get; set; }
@@ -489,7 +488,7 @@ public class Order
 }
 
 [DynamicEntity(Parent = "MyApp.Orders.Order")]
-public class OrderLine
+public class OrderLine : DynamicEntityBase
 {
     [DynamicForeignKey("MyApp.Products.Product", "Name")]
     public Guid ProductId { get; set; }