Switch from Devlooped.JQ to Devlooped.JQSharp

[Copilot]

Replaces the external jq binary dependency (Devlooped.JQ) with Devlooped.JQSharp, a pure .NET in-process implementation of the jq filter language.

Changes

• dotnet-openai.csproj: Swap Devlooped.JQ v1.8.1.1 → Devlooped.JQSharp v1.0.1
• JsonOutput.cs: Replace process-spawning logic with Jq.Evaluate():
  • Removes process management, SHA256 temp-file workaround for multiline queries, and stdin/stdout piping
  • Raw string output (-r flag equivalent): JsonValueKind.String results unquoted via GetString() ?? string.Empty, everything else via GetRawText()
  • JqException replaces process exit code checks for error reporting
  • Cancellation checked between results rather than on a process wait loop

using var doc = JsonDocument.Parse(json);
var results = Jq.Evaluate(jq.Trim(), doc.RootElement);
var lines = new List<string>();
foreach (var result in results)
{
    if (cancellation.IsCancellationRequested) return -1;
    lines.Add(result.ValueKind == JsonValueKind.String
        ? result.GetString() ?? string.Empty
        : result.GetRawText());
}
if (lines.Count > 0)
    WriteJson(console, monochrome, string.Join(Environment.NewLine, lines));

Eliminates the requirement for jq to be installed on the host and is ~140× faster per call (no process spawn overhead).

[kzu]

🧪 Details on Ubuntu 24.04.4 LTS

from retest v1.1.0 on .NET 10.0.7 with 💜 by @devlooped