NuGet v2 - Support install endpoints

Problem to solve

Currently, if you use the GitLab Package Registry to publish NuGet packages, you have to use v3 of NuGet. However, if you are using Chocolatey, this is a problem as Chocolatey only supports v2 of NuGet.

As identified here, it's possible that some customers are using a mix of v2 and v3 and if they are migrating from Artifactory to GitLab, they likely need support for the older version.

Proposal

This issue will focus on adding support for the install endpoints so that .NET developers can install for NuGet packages to the GitLab registry using Chocolatey.

Reference

• Unofficial NuGet v2 protocol API docs