:docs: add target frameworks and DocFX docs badges to README

Author: techouse

README.md

@@ -4,10 +4,12 @@ A query string encoding and decoding library for C#/.NET.
 
 Ported from [qs](https://www.npmjs.com/package/qs) for JavaScript.
 
+[![Targets](https://img.shields.io/badge/dynamic/xml?url=https%3A%2F%2Fraw.githubusercontent.com%2Ftechouse%2Fqs-net%2Fmain%2FQsNet%2FQsNet.csproj&query=string(//TargetFrameworks|//TargetFramework)&label=targets&logo=dotnet&color=512BD4&labelColor=222222&logoColor=white&style=flat-square&link=https%3A%2F%2Fwww.nuget.org%2Fpackages%2FQsNet)]((https://www.nuget.org/packages/QsNet))
+[![DocFX Docs](https://img.shields.io/badge/DocFX-docs-512BD4?logo=dotnet&logoColor=white&labelColor=222222&style=flat-square)](https://techouse.github.io/qs-net/)
 [![NuGet Version](https://img.shields.io/nuget/v/QsNet)](https://www.nuget.org/packages/QsNet)
 [![NuGet Downloads](https://img.shields.io/nuget/dt/QsNet)](https://www.nuget.org/packages/QsNet)
 [![Test](https://github.com/techouse/qs-net/actions/workflows/test.yml/badge.svg)](https://github.com/techouse/qs-net/actions/workflows/test.yml)
-[![codecov](https://codecov.io/gh/techouse/qs-net/graph/badge.svg?token=ClCDNcsxqQ)](https://codecov.io/gh/techouse/qs-net)
+[![codecov](https://codecov.io/gh/techouse/qs-net/graph/badge.svg?token=pmMJRph0Qm)](https://codecov.io/gh/techouse/qs-net)
 [![GitHub](https://img.shields.io/github/license/techouse/qs-net)](LICENSE)
 [![GitHub Repo stars](https://img.shields.io/github/stars/techouse/qs-net)](https://github.com/techouse/qs-net/stargazers)