Added setting for spellchecking

app/MindWork AI Studio/Settings/Data.cs

@@ -31,4 +31,9 @@ public sealed class Data
     /// Shortcuts to send the input to the AI.
     /// </summary>
     public SendBehavior ShortcutSendBehavior { get; set; } = SendBehavior.MODIFER_ENTER_IS_SENDING;
+    
+    /// <summary>
+    /// Should we enable spellchecking for all input fields?
+    /// </summary>
+    public bool EnableSpellchecking { get; set; }
 }

app/MindWork AI Studio/Settings/SettingsManager.cs

@@ -121,4 +121,6 @@ public sealed class SettingsManager
         var settingsJson = JsonSerializer.Serialize(this.ConfigurationData);
         await File.WriteAllTextAsync(settingsPath, settingsJson);
     }
+    
+    public void InjectSpellchecking(Dictionary<string, object?> attributes) => attributes["spellcheck"] = this.ConfigurationData.EnableSpellchecking ? "true" : "false";
 }