feat: add GetJson<T> to MsSqlDataReader for direct JSON deserialization

Author: vkuttyp

Directory.Build.props

@@ -7,6 +7,6 @@
     <Authors>vkuttyp</Authors>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <RepositoryUrl>https://github.com/vkuttyp/CosmoSQLClient-Dotnet</RepositoryUrl>
-    <Version>1.9.43</Version>
+    <Version>1.9.44</Version>
   </PropertyGroup>
 </Project>

NuGetScratch/lock/24aa6aa4a9b0696c9c98a2adbec424b7e254ac59

@@ -1,3 +1,4 @@
+using System.Text.Json;
 using System.Collections;
 using System.Data;
 using System.Data.Common;
@@ -167,6 +168,16 @@ public override int GetValues(object[] values)
     public override Guid     GetGuid(int ordinal)     => Get(ordinal).AsGuid() ?? throw Null(ordinal);
     public override DateTime GetDateTime(int ordinal) => Get(ordinal).AsDate() ?? throw Null(ordinal);
 
+    public T? GetJson<T>(int ordinal)
+    {
+        var v = Get(ordinal);
+        if (v.IsNull) return default;
+        var json = v.AsString();
+        return string.IsNullOrWhiteSpace(json) ? default : JsonSerializer.Deserialize<T>(json);
+    }
+
+    public T? GetJson<T>(string name) => GetJson<T>(GetOrdinal(name));
+
     public override char GetChar(int ordinal)
     {
         var s = GetString(ordinal);