Add InvalidFilterException, enhance DbSet and Queryable extensions with pagination and dynamic sorting

Author: Clifftech123

src/EfCoreKit.Abstractions/Exceptions/InvalidFilterException.cs

@@ -0,0 +1,22 @@
+namespace EfCoreKit.Abstractions.Exceptions;
+
+/// <summary>
+/// Thrown when a <see cref="EfCoreKit.Abstractions.Models.FilterDescriptor"/> is invalid —
+/// e.g. a missing field name or an unsupported operator.
+/// </summary>
+public sealed class InvalidFilterException : EfCoreKitException
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="InvalidFilterException"/> class.
+    /// </summary>
+    /// <param name="message">The message that describes the error.</param>
+    public InvalidFilterException(string message) : base(message) { }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="InvalidFilterException"/> class
+    /// with an inner exception.
+    /// </summary>
+    /// <param name="message">The message that describes the error.</param>
+    /// <param name="inner">The exception that caused this exception.</param>
+    public InvalidFilterException(string message, Exception inner) : base(message, inner) { }
+}

src/EfCoreKit.Core/Context/EfCoreKitDbContext.cs

@@ -84,6 +84,9 @@ private void OnBeforeSaveChanges()
     private void ConfigureGlobalFilters(ModelBuilder modelBuilder)
     {
         // TODO: Apply ISoftDeletable global filter
+           
+           
+
         // TODO: Apply ITenantEntity global filter
     }
 }