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>

frm_CreateInstance.cs

@@ -0,0 +1,21 @@
+using ClawdDotNet.Services;
+
+namespace ClawdDotNet;
+
+public sealed partial class frm_CreateInstance : Form
+{
+    public string InstanceName => txtName.Text.Trim();
+
+    public frm_CreateInstance()
+    {
+        InitializeComponent();
+    }
+
+    private void OnTxtNameTextChanged(object? sender, EventArgs e)
+    {
+        var name = txtName.Text.Trim();
+        lblPreview.Text = string.IsNullOrWhiteSpace(name)
+            ? "Ordner: Instance-..."
+            : $"Ordner: {InstanceDirectoryManager.BuildInstanceFolderName(name)}";
+    }
+}