Convert-From-Nuget ignores developmentDependency

Description

Convert-From-Nuget ignores developmentDependency

Repro steps

1. Make a packages.config file (ie NuGet) with a developmentDependency, eg

<?xml version="1.0" encoding="utf-8"?>
  <packages>
    <package id="Microsoft.Net.Compilers" version="2.8.2" targetFramework="net462" developmentDependency="true" />
  </packages>

2. run paket convert-from-nuget
3. Observe that the output paket.dependencies and paket.references don't mention this development dependency anywhere - ie the output is the same regardless of whether developmentDependency is true or false, meaning paket is ignoring this flag.

Side note - nowhere in the paket documentation does it show how to support developmentDependency transitive dependencies in a project. I assume paket just flat-out doesn't support this flag from nuget?

Expected behavior

Output package.dependencies/references list the dependency as development

Actual behavior

Output package.dependencies/references does not list the dependency as development

Known workarounds

None that I know of

Start by reproducing paket convert-from-nuget with the supplied packages.config, then trace the conversion handling for the developmentDependency attribute. Confirm the generated paket.dependencies and paket.references preserve the development dependency, and add or update coverage for both true and false values.