[Launcher] Check for disabledPackageSources (in NuGet.config)

[SeleDreams]

Release Type: Official Release

Version: Xenko Launcher 3.0.1

Platform(s): Windows

Describe the bug
Because Xenko Launcher doesn't check for disablePackageSources in NuGet.conf, if the xenko nuget packages are disabled, the xenko launcher will think it's offline and won't be able to connect to the internet to download the xenko builds from the internet

To Reproduce
Steps to reproduce the behavior:

1. open NuGet.config in %APPDATA%\NuGet\NuGet.config
2. add these lines in configuration

<disabledPackageSources>
    <add key="Xenko" value="true" />
    <add key="Xenko Dev" value="true" />
  </disabledPackageSources>

3. The Xenko launcher cannot connect and download xenko builds

Expected behavior
The launcher should check if the xenko package are disabled and automatically enable them, or ask the user the authorization to enable them

Screenshots

[Eideren]

Isn't this expected behavior though ? If users explicitly disable nugget sources they probably don't want xenko/stride to attempt fetching them ? I'll mark this one as enhancement instead, seeing as we could extend the window to mention why it failed.

[Kryptos-FR]

@Eideren Yes I would also expect that the Launcher doesn't find them if the sources are disabled.

Not sure if the API let's us find out about disabled packages. If so, displaying a more explicit error message could be an option.