Automate release creation

[madcowfred]

Manually creating releases is rather tedious, automate the process. On tag push matching v*:

• create a zip of the current files:
  • named WoWthing_Collector-{tag}.zip
  • with all files in a directory named WoWthing_Collector
  • excluding .git/*, README.md, and wherever Github files live (.github/*?)
• create a Github release:
  • named {tag}
  • with the changelog section matching the tag
  • with the above zip attached
• if possible, update CurseForge with the same info