Added tool calling support (#731)

Co-authored-by: krut_ni <nils.kruthoff@dlr.de>
Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/ToolCallingSystem/ToolDefinition.cs

@@ -0,0 +1,30 @@
+using AIStudio.Provider;
+
+namespace AIStudio.Tools.ToolCallingSystem;
+
+public sealed class ToolDefinition
+{
+    public int SchemaVersion { get; init; } = 1;
+
+    public string Id { get; init; } = string.Empty;
+
+    public string ImplementationKey { get; init; } = string.Empty;
+
+    public ToolVisibilityDefinition VisibleIn { get; init; } = new();
+
+    public ToolSettingsSchema SettingsSchema { get; init; } = new();
+
+    public string SystemPromptInstructions { get; init; } = string.Empty;
+
+    /// <summary>
+    /// The lowest provider confidence this tool may be used with, unless an administrator or the
+    /// user says otherwise.
+    /// </summary>
+    /// <remarks>
+    /// Belongs to the tool, because only the tool knows what it exposes: a web search sends the
+    /// user's question to a search engine, so it asks for more trust than a calculator would.
+    /// </remarks>
+    public ConfidenceLevel MinimumProviderConfidence { get; init; } = ConfidenceLevel.NONE;
+
+    public ToolFunctionDefinition Function { get; init; } = new();
+}