Added error message for not yet implemented complete BIDS project

.idea/misc.xml

@@ -3,5 +3,5 @@
   <component name="Black">
     <option name="sdkName" value="Python 2.7 (pythonProject)" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.12 (pythonProject) (3)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.12 (pythonProject)" project-jdk-type="Python SDK" />
 </project>
\ No newline at end of file

.idea/pythonProject.iml

@@ -5,7 +5,7 @@
       <sourceFolder url="file://$MODULE_DIR$/BIDSHandler/tests" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/venv" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.12 (pythonProject) (3)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.12 (pythonProject)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file

BIDSHandler/CreationTool/Application.py

@@ -279,8 +279,7 @@ class Application(tk.Frame):
     def complete_bids_project(self):
         """ To be implemented.
         """
-
-        pass
+        messagebox.showinfo('Information', 'This feature is not implemented yet')
 
     def tool_selection(self):
         """ This method is used to go back to the tool selection.