Add confidence levels (#140)

app/MindWork AI Studio/Provider/ConfidenceLevelExtensions.cs

@@ -0,0 +1,34 @@
+namespace AIStudio.Provider;
+
+public static class ConfidenceLevelExtensions
+{
+    public static string GetName(this ConfidenceLevel level) => level switch
+    {
+        ConfidenceLevel.NONE => "No provider selected",
+        
+        ConfidenceLevel.UNTRUSTED => "Untrusted",
+        ConfidenceLevel.VERY_LOW => "Very Low",
+        ConfidenceLevel.LOW => "Low",
+        ConfidenceLevel.MODERATE => "Moderate",
+        ConfidenceLevel.MEDIUM => "Medium",
+        ConfidenceLevel.HIGH => "High",
+        
+        _ => "Unknown confidence level",
+    };
+    
+    public static string GetColor(this ConfidenceLevel level) => level switch
+    {
+        ConfidenceLevel.NONE => "#cccccc",
+        
+        ConfidenceLevel.UNTRUSTED => "#ff0000",
+        ConfidenceLevel.VERY_LOW => "#ff6600",
+        ConfidenceLevel.LOW => "#ffcc00",
+        ConfidenceLevel.MODERATE => "#99cc00",
+        ConfidenceLevel.MEDIUM => "#86b300",
+        ConfidenceLevel.HIGH => "#009933",
+        
+        _ => "#cc6600",
+    };
+    
+    public static string SetColorStyle(this ConfidenceLevel level) => $"--confidence-color: {level.GetColor()};";
+}