Unable to search for packages in nuget server without SearchAutocompleteService

Description

Paket 5.257.0

I am unable to get packages from private Azure DevOps nuget server with "dotnet paket find-packages ". When I run this command with "--verbose" flag, I can see this error:

getSearchAPI: System.Exception: could not find an AutoComplete endpoint for https://pkgs.dev.azure.com/<snip_for_privacy_reasons>/nuget/v3/index.json
   at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1645.Invoke(String message)
   at Paket.NuGetV3.getNuGetV3Resource@143-1.Invoke(FSharpMap`2 _arg2) in D:\code\Paket\src\Paket.Core\Dependencies\NuGetV3.fs:line 146
   at Microsoft.FSharp.Control.AsyncBuilderImpl.args@506-1.Invoke(a a)

All of the other Nuget tools work fine with this server (built-in tools in Visual Studio and JetBrains Rider). I think that they must be using "SearchQueryService" instead of "SearchAutocompleteService". FYI, my private server doesn't list "SearchAutocompleteService" as an available resource.

It is worth mentioning that this only affects searching for packages, other Paket functionality works fine.

Repro steps

Please provide the steps required to reproduce the problem

1. Have a nuget server that doesn't implement AutoComplete service. (I'm using Azure DevOps "Artifacts")

2. Try to use "find-packages" command.

Expected behavior

Packages from my private nuget can be seen just like they used to in Visual Studio and Rider so Paket can be drop-in replacement for other tools.

Actual behavior

My nuget source is ignored by this command.

Known workarounds

Using web based tools to search for packages.

Start in src/Paket.Core/Dependencies/NuGetV3.fs around line 146 and trace the find-packages search-resource lookup for the private Azure DevOps NuGet source. Check how SearchAutocompleteService is selected and how SearchQueryService is exposed; done means find-packages can search sources without an autocomplete endpoint, while existing Paket functionality remains unaffected.