524c6db46f
- add `nuget` package type proxying a NuGet v3 feed, with `index.json` mapped to the upstream service index - rewrite upstream-origin URLs in served JSON per request so flat container and registration lookups go through the remote - treat `.nupkg`/`.nuspec` as immutable and indexes as mutable - add a `nuget.config` usage snippet to the UI and a nuget e2e caching case