Added NuGet readme

NUGET_README.md

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+![GitHub contributors](https://img.shields.io/github/contributors/DevuysCode/XValid)
+![GitHub issues](https://img.shields.io/github/issues/DevuysCode/XValid)
+![GitHub](https://img.shields.io/github/license/DevuysCode/XValid)
+![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/DevuysCode/XValid/dotnet.yml?branch=main)
+![GitHub release (latest SemVer)](https://img.shields.io/github/v/release/DevuysCode/XValid)
+
+# XValid - A Simple Validator Library
+
+A simple validator library for various things, such as coordinates, credit cards, domain names, emails, IBANs, IP addresses, ISBNs, and more.
+
+[View documentation »](https://dev.peyronnet.group/xvalid/) · [Report Bug](https://github.com/DevuysCode/XValid/issues/new?assignees=&labels=bug&template=bug-report.yml&title=%5BBug%5D+) · [Request Feature](https://github.com/DevuysCode/XValid/issues/new?assignees=&labels=enhancement&template=feature-request.yml&title=%5BEnhancement%5D+)
+
+## Features
+
+- [x] Validate coordinates.
+- [x] Validate credit card numbers.
+- [x] Validate domain names.
+- [x] Validate email addresses.
+- [x] Validate IBANs.
+- [x] Validate IP addresses.
+- [x] Validate ISBNs.
+- [ ] More features are planned for future releases.
+
+## How to Use
+
+1. Install XValid via NuGet using the following command:
+
+```
+Install-Package XValid
+```
+
+or
+
+```
+dotnet add package XValid
+```
+
+2. Import the `XValid` namespace in your C# code.
+
+3. Start validating!
+
+### Coordinate Validation
+
+```csharp
+using XValid;
+
+double latitude = 40.7128; // Example latitude
+double longitude = -74.0060; // Example longitude
+bool isValidCoordinate = CoordinateValidator.IsValidCoordinate(latitude, longitude);
+```
+
+### Credit Card Validation
+
+```csharp
+using XValid;
+
+string creditCardNumber = "4111 1111 1111 1111"; // Example card number (Visa)
+bool isValidCreditCard = CreditCardValidator.IsValidCreditCardNumber(creditCardNumber);
+```
+
+### Domain Name Validation
+
+```csharp
+using XValid;
+
+string domainName = "example.com";
+bool isValidDomainName = DomainNameValidator.IsValid(domainName);
+```
+
+### Email Validation
+
+```csharp
+using XValid;
+
+string email = "[email protected]";
+bool isValidEmail = EmailValidator.IsValidEmail(email);
+```
+
+### IBAN Validation
+
+```csharp
+using XValid;
+
+string iban = "DE89370400440532013000"; // Example IBAN (Germany)
+bool isValidIBAN = IBANValidator.IsValidIBAN(iban);
+```
+
+### IP Address Validation
+
+```csharp
+using XValid;
+
+string ipAddress = "192.0.2.1"; // Example IP address
+bool isValidIPAddress = IPAddressValidator.IsValidIPAddress(ipAddress);
+```
+
+### ISBN Validation
+
+```csharp
+using XValid;
+
+string isbn = "978-3-16-148410-0";
+bool isValidISBN = ISBNValidator.IsValidISBN(isbn);
+```
+
+## Contribution Guidelines
+
+To contribute to XValid, follow these steps:
+
+1. Ensure you have the following tools installed:
+   - Visual Studio 2022 v17.0 or higher
+   - .NET 6.0 SDK
+   - Git
+   - .NET 6
+2. Fork the XValid repository and clone it to your local machine.
+3. Make your changes or add new features.
+4. Write tests to ensure the changes are functioning as expected.
+5. Submit a pull request to the main repository.
+
+For more detailed guidelines, check out the [contribution guidelines](CONTRIBUTING.md).
+
+## License
+
+This project is under the [MIT License](LICENSE).