Switch from Github Actions to AppVeyor

Author: brliron

.github/workflows/main.yml

@@ -3,6 +3,7 @@ Touhou Community Reliant Automatic Patcher
 
 [![Join the chat at http://discord.thpatch.net](https://discordapp.com/api/guilds/213769640852193282/widget.png)](http://discord.thpatch.net/)
 [![Backers on Open Collective](https://opencollective.com/thpatch/backers/badge.svg)](#backers)
+[![Build status](https://ci.appveyor.com/api/projects/status/6mcjhegcnplaojd0?svg=true)](https://ci.appveyor.com/project/brliron/thcrap-nightly)
 [![GitHub Release](https://img.shields.io/github/release/thpatch/thcrap.svg)](https://github.com/thpatch/thcrap/releases)
 
 ## Description ##