Initial commit: ClawdDotNet

Import des bestehenden Projektstands in Git.
- .NET 10 WinForms Anwendung (Multi-Agent / Tool-System)
- .gitignore fuer Build-Artefakte, Secrets und Runtime-Daten ergaenzt

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/ClawdDotNet.Core/Engine/AgentRunResult.cs

@@ -0,0 +1,19 @@
+namespace ClawdDotNet.Core.Engine;
+
+public sealed record AgentRunResult(
+    string AgentId,
+    AgentRunStatus Status,
+    string? FinalMessage,
+    int StepCount,
+    int TokensUsed,
+    TimeSpan Duration,
+    Exception? Error = null
+);
+
+public enum AgentRunStatus
+{
+    Completed,
+    Failed,
+    Cancelled,
+    LoopLimitExceeded
+}