Add project badges to README

Added badges for Codacy, CMake, Build status, and MSBuild.

Author: Tomenz

README.md

@@ -1,5 +1,6 @@
 # Http2Serv
 
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/81cec694811b405499957ad3b2c71f2a)](https://app.codacy.com/gh/Tomenz/Http2Serv/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
 [![CMake](https://github.com/Tomenz/Http2Serv/actions/workflows/cmake.yml/badge.svg)](https://github.com/Tomenz/Http2Serv/actions/workflows/cmake.yml)
 [![Build status](https://ci.appveyor.com/api/projects/status/j1t2pm3i2gy378wj?svg=true)](https://ci.appveyor.com/project/Tomenz/http2serv)
 [![MSBuild](https://github.com/Tomenz/Http2Serv/actions/workflows/msbuild.yml/badge.svg)](https://github.com/Tomenz/Http2Serv/actions/workflows/msbuild.yml)