README.md: Prettify.

Credit to @ektrah (the maintainer of NSec) for this template.

README.md

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+# Geralt
+
 [![License: MIT](https://img.shields.io/badge/License-MIT-red.svg)](https://github.com/samuel-lucas6/Geralt/blob/main/LICENSE)
+[![NuGet](https://img.shields.io/badge/nuget-latest-blue)](https://www.nuget.org/packages/Geralt)
 
-# Geralt
+[Geralt](https://www.geralt.xyz/) is a modern cryptographic library for [.NET 6](https://dotnet.microsoft.com/en-us/download/dotnet/6.0) based on [libsodium](https://doc.libsodium.org/) and inspired by [Monocypher](https://monocypher.org/).
+
+- **Simple**: an easy-to-learn API with descriptive naming. Only one primitive for each task is provided when possible.
+- **Modern**: the latest and greatest cryptographic primitives, such as (X)ChaCha20-Poly1305, BLAKE2b, Argon2id, X25519, and Ed25519.
+- **Secure**: libsodium was [audited](https://www.privateinternetaccess.com/blog/libsodium-audit-results/) in 2017 and is the library of choice for [lots](https://doc.libsodium.org/libsodium_users) of projects and [even](https://doc.libsodium.org/libsodium_users#companies-using-libsodium) large companies.
+- **Fast**: libsodium is [faster](https://monocypher.org/speed) than many other cryptographic libraries. Furthermore, Geralt uses [Span<T>](https://docs.microsoft.com/en-us/archive/msdn-magazine/2017/connect/csharp-all-about-span-exploring-a-new-net-mainstay) buffers to avoid memory allocations.
+
+For more information, please view to the following resources:
 
-A modern cryptographic library for [.NET 6](https://dotnet.microsoft.com/en-us/download/dotnet/6.0) based on [libsodium](https://doc.libsodium.org/) and inspired by [Monocypher](https://monocypher.org/).
+|                           |                                                  |
+|:------------------------- |:------------------------------------------------ |
+| Documentation:            | https://www.geralt.xyz/                          |
+| Installation:             | https://www.geralt.xyz/#installation             |
+| Open issues:              | https://github.com/samuel-lucas6/Geralt/issues   |
+| Pull requests:            | https://github.com/samuel-lucas6/Geralt/pulls    |