docs: add NuGet badges to README

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vkuttyp

README.md

@@ -2,6 +2,20 @@
 
 A lightweight, high-performance database client library for .NET designed for low-latency, high-throughput applications. CosmoSQLClient provides a unified interface for multiple database engines while minimizing memory allocations and binary footprint.
 
+## NuGet Packages
+
+| Package | NuGet |
+|---|---|
+| `CosmoSQLClient.Core` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.Core.svg)](https://www.nuget.org/packages/CosmoSQLClient.Core/) |
+| `CosmoSQLClient.MsSql` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.MsSql.svg)](https://www.nuget.org/packages/CosmoSQLClient.MsSql/) |
+| `CosmoSQLClient.Postgres` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.Postgres.svg)](https://www.nuget.org/packages/CosmoSQLClient.Postgres/) |
+| `CosmoSQLClient.MySql` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.MySql.svg)](https://www.nuget.org/packages/CosmoSQLClient.MySql/) |
+| `CosmoSQLClient.Sqlite` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.Sqlite.svg)](https://www.nuget.org/packages/CosmoSQLClient.Sqlite/) |
+| `CosmoSQLClient.MsSql.EntityFrameworkCore` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.MsSql.EntityFrameworkCore.svg)](https://www.nuget.org/packages/CosmoSQLClient.MsSql.EntityFrameworkCore/) |
+| `CosmoSQLClient.Postgres.EntityFrameworkCore` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.Postgres.EntityFrameworkCore.svg)](https://www.nuget.org/packages/CosmoSQLClient.Postgres.EntityFrameworkCore/) |
+| `CosmoSQLClient.MySql.EntityFrameworkCore` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.MySql.EntityFrameworkCore.svg)](https://www.nuget.org/packages/CosmoSQLClient.MySql.EntityFrameworkCore/) |
+| `CosmoSQLClient.Sqlite.EntityFrameworkCore` | [![NuGet](https://img.shields.io/nuget/v/CosmoSQLClient.Sqlite.EntityFrameworkCore.svg)](https://www.nuget.org/packages/CosmoSQLClient.Sqlite.EntityFrameworkCore/) |
+
 ## Key Features
 
 - **High-Performance Pipeline Architecture**: Built on top of `System.IO.Pipelines` for efficient asynchronous I/O and protocol decoding.