Add comprehensive documentation with usage guide, getting started, and advanced features

Co-authored-by: WeihanLi <7604648+WeihanLi@users.noreply.github.com>

Author: Copilot

README.md

@@ -10,7 +10,94 @@
 
 ## Intro
 
-[EntityFrameworkCore](https://github.com/dotnet/efcore) extensions
+[EntityFrameworkCore](https://github.com/dotnet/efcore) extensions that provide a comprehensive set of tools and patterns to enhance your Entity Framework Core development experience.
+
+WeihanLi.EntityFramework offers:
+
+- **Repository Pattern** - Clean abstraction layer for data access
+- **Unit of Work Pattern** - Transaction management across multiple repositories  
+- **Automatic Auditing** - Track all entity changes with flexible storage options
+- **Auto-Update Features** - Automatic handling of CreatedAt/UpdatedAt timestamps and user tracking
+- **Soft Delete** - Mark entities as deleted without physical removal
+- **Database Extensions** - Convenient methods for bulk operations and queries
+- **Database Functions** - SQL Server JSON operations and more
+
+## Quick Start
+
+### 1. Installation
+
+```bash
+dotnet add package WeihanLi.EntityFramework
+```
+
+### 2. Basic Setup
+
+```csharp
+// Program.cs
+var builder = WebApplication.CreateBuilder(args);
+
+// Add DbContext
+builder.Services.AddDbContext<MyDbContext>(options =>
+    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));
+
+// Add WeihanLi.EntityFramework services
+builder.Services.AddEFRepository();
+builder.Services.AddEFAutoUpdateInterceptor();
+builder.Services.AddEFAutoAudit(auditBuilder =>
+{
+    auditBuilder.WithUserIdProvider<HttpContextUserIdProvider>()
+                .WithStore<AuditDatabaseStore>();
+});
+
+var app = builder.Build();
+```
+
+### 3. Define Your Entities
+
+```csharp
+public class Product : IEntityWithCreatedUpdatedAt, ISoftDeleteEntityWithDeleted
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public decimal Price { get; set; }
+    
+    // Auto-update properties
+    public DateTimeOffset CreatedAt { get; set; }
+    public DateTimeOffset UpdatedAt { get; set; }
+    
+    // Soft delete property
+    public bool IsDeleted { get; set; }
+}
+```
+
+### 4. Use Repository Pattern
+
+```csharp
+public class ProductService
+{
+    private readonly IEFRepository<MyDbContext, Product> _repository;
+
+    public ProductService(IEFRepository<MyDbContext, Product> repository)
+    {
+        _repository = repository;
+    }
+
+    public async Task<Product> CreateProductAsync(string name, decimal price)
+    {
+        var product = new Product { Name = name, Price = price };
+        return await _repository.InsertAsync(product);
+        // CreatedAt/UpdatedAt automatically set, audit record created
+    }
+
+    public async Task<List<Product>> GetActiveProductsAsync()
+    {
+        return await _repository.GetListAsync(
+            queryBuilder => queryBuilder.WithPredict(p => p.Price > 0)
+        );
+        // Soft deleted products automatically filtered out
+    }
+}
+```
 
 ## Package Release Notes
 
@@ -33,36 +120,58 @@ See Releases/PRs for details
 
 ## Features
 
-- Repository
-  
-  - `EFRepository`
-  - `EFRepositoryGenerator`
+### 🏗️ Repository Pattern
+- `IEFRepository<TDbContext, TEntity>` - Generic repository interface
+- `EFRepository` - Full-featured repository implementation
+- `EFRepositoryGenerator` - Dynamic repository creation
+- **Query Builder** - Fluent API for complex queries
+- **Bulk Operations** - Efficient batch updates and deletes
 
-- UoW
-  
-  - `EFUnitOfWork`  
+### 🔄 Unit of Work Pattern  
+- `IEFUnitOfWork<TDbContext>` - Transaction management
+- **Multi-Repository Transactions** - Coordinate changes across entities
+- **Rollback Support** - Automatic error handling
 
-- DbFunctions
-  
-  - `JsonValue` implement `JSON_VALUE` for SqlServer 2016 and above
+### 📋 Comprehensive Auditing
+- **Automatic Change Tracking** - Monitor all entity modifications
+- **Flexible Storage** - Database, file, console, or custom stores
+- **Property Enrichment** - Add custom metadata to audit records
+- **User Tracking** - Capture who made changes
+- **Configurable Filtering** - Include/exclude entities and properties
 
-- Audit
+### ⚡ Auto-Update Features
+- **Timestamp Management** - Automatic CreatedAt/UpdatedAt handling
+- **User Tracking** - Automatic CreatedBy/UpdatedBy population
+- **Soft Delete** - Mark entities as deleted without removal
+- **Custom Auto-Update** - Define your own auto-update rules
 
-  - Auto auditing for entity changes
- 
-- AutoUpdate
+### 🔧 Database Extensions
+- **Column Updates** - Update specific columns only
+- **Bulk Operations** - Efficient mass updates
+- **Query Helpers** - Get table/column names, check database type
+- **Paging Support** - Built-in pagination for large datasets
 
-  - Soft delete for the specific entity
-  - Auto update CreatedAt/UpdatedAt/CreatedBy/UpdatedBy
+### 🗄️ Database Functions
+- **JSON Support** - `JSON_VALUE` for SQL Server 2016+
+- **SQL Server Functions** - Enhanced querying capabilities
 
-- Extensions
+## Documentation
 
-  - Update specific column(s) `Update`
-  - Update without specific column(s) `UpdateWithout`
+🚀 **[Getting Started Guide](docs/GettingStarted.md)** - Step-by-step setup instructions for new users
+
+📖 **[Complete Usage Guide](docs/Usage.md)** - Comprehensive documentation with examples for all features
+
+📋 **[Release Notes](docs/ReleaseNotes.md)** - Version history and breaking changes
+
+🔧 **[Sample Project](samples/WeihanLi.EntityFramework.Sample/)** - Working examples and demonstrations
 
 ## Support
 
-Feel free to try and [create issues](https://github.com/WeihanLi/WeihanLi.EntityFramework/issues/new) if you have any questions or integration issues
+💡 **Questions?** Check out the [Usage Guide](docs/Usage.md) for detailed examples
+
+🐛 **Found a bug?** [Create an issue](https://github.com/WeihanLi/WeihanLi.EntityFramework/issues/new) with reproduction steps
+
+💬 **Need help?** Feel free to [start a discussion](https://github.com/WeihanLi/WeihanLi.EntityFramework/discussions) or create an issue
 
 ## Usage