Switch to using the nuget pkg proxy

[ljoonal]

This way we don't need to have world readable GHA tokens, handled by the proxy instead. If me/my reverse proxy ever goes offline can be replaced quite easily, just need nginx and a domain:

http {
  map $request_uri $first_slash_path {
    "~/(?<p>[^/]+)/" $p;
  }
  ...
}

And the server block;

server {
  server_name pkg.munally.com;
  include tls/munally.conf;
  include errors.conf;

  location / {
    add_header Content-Type text/html;
    return 200 '<ul><li><a href="https://pkg.munally.com/MonkeyModdingTroop/index.json">MonkeyModdingTroop</a></li><li><a href="https://pkg.munally.com/ResoniteModdingGroup/index.json">ResoniteModdingGroup</a></li><li><a href="https://pkg.munally.com/LJ/index.json">com.munally.lj</a></li></ul>';
  }

  location ~^/(MonkeyModdingTroop|ResoniteModdingGroup)(/|$) {
    proxy_pass https://nuget.pkg.github.com$request_uri;
    proxy_set_header Authorization "Basic base64(user:token)";
    sub_filter "https://nuget.pkg.github.com/$first_slash_path" "https://pkg.munally.com/$first_slash_path";
    sub_filter_last_modified on;
    sub_filter_types application/json;
    sub_filter_once off;
  }

  location /LJ {
    proxy_pass https://nuget.pkg.github.com/ResoniteModdingGroup;
    sub_filter "https://.../api/packages/..." "https://pkg.munally.com/LJ";
    sub_filter_last_modified on;
    sub_filter_types application/json;
    sub_filter_once off;
  }
}

For anyone else reading this later on: feel free to use the proxy, but please don't try to abuse it, as I don't really feel like implementing caching to deal with rate limits :'D

  <PropertyGroup>
    <RestoreAdditionalProjectSources>https://pkg.munally.com/MonkeyModdingTroop/index.json;https://pkg.munally.com/ResoniteModdingGroup/index.json</RestoreAdditionalProjectSources>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="MonkeyLoader" Version="0.3.0-beta" />
    <PackageReference Include="MonkeyLoader.GamePacks.Unity" Version="0.3.0-beta" />
  </ItemGroup>