Updates the readme badges (#7589)

* Removes old LGTM badges.
* Adds new badges for each of the different build types.
* Adds badge for commits per week.

README.md

@@ -1,7 +1,7 @@
 <img src="doc/logo.png" align="right" height="90" />
 
 # rAthena
-[![Total alerts](https://img.shields.io/lgtm/alerts/g/rathena/rathena.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/rathena/rathena/alerts/) [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/rathena/rathena.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/rathena/rathena/context:cpp) ![GitHub](https://img.shields.io/github/license/rathena/rathena.svg) ![GitHub repo size](https://img.shields.io/github/repo-size/rathena/rathena.svg)
+![clang](https://img.shields.io/github/actions/workflow/status/rathena/rathena/build_servers_clang.yml?label=clang%20build&logo=llvm) ![cmake](https://img.shields.io/github/actions/workflow/status/rathena/rathena/build_servers_cmake.yml?label=cmake%20build&logo=cmake) ![gcc](https://img.shields.io/github/actions/workflow/status/rathena/rathena/build_servers_gcc.yml?label=gcc%20build&logo=gnu) ![ms](https://img.shields.io/github/actions/workflow/status/rathena/rathena/build_servers_msbuild.yml?label=ms%20build&logo=visualstudio) ![GitHub](https://img.shields.io/github/license/rathena/rathena.svg) ![commit activity](https://img.shields.io/github/commit-activity/w/rathena/rathena) ![GitHub repo size](https://img.shields.io/github/repo-size/rathena/rathena.svg)
 > rAthena is a collaborative software development project revolving around the creation of a robust massively multiplayer online role playing game (MMORPG) server package. Written in C, the program is very versatile and provides NPCs, warps and modifications. The project is jointly managed by a group of volunteers located around the world as well as a tremendous community providing QA and support. rAthena is a continuation of the eAthena project.
 
 [Forum](https://rathena.org/board)|[Discord](https://rathena.org/discord)|[Wiki](https://github.com/rathena/rathena/wiki)|[FluxCP](https://github.com/rathena/FluxCP)|[Crowdfunding](https://rathena.org/board/crowdfunding/)|[Fork and Pull Request Q&A](https://rathena.org/board/topic/86913-pull-request-qa/)