Update package and class references, improve documentation, and remove outdated test

- Renamed package from com.waveletsolutions.robot to com.waveletsolutions.filtering
- Updated the main class reference in pom.xml to ensure the application runs correctly
- Improved class documentation to reflect the educational and professional use of signal processing techniques
- Removed outdated AppTest.java file, which was no longer relevant

src/main/java/com/waveletsolutions/filtering/App.java

@@ -41,8 +41,11 @@ import org.apache.commons.math3.transform.TransformType;
  *   <li>Real-time plots of both time-domain and frequency-domain (FFT) data.</li>
  * </ul>
  * 
- * This class is intended as an educational tool for students learning about signal processing 
- * in the context of controlling a robot motor.
+ * This class is intended as an educational tool for students and professional engineers 
+ * learning about signal processing techniques, such as filtering, in the context of real-time 
+ * signal control and visualization.
+ * It demonstrates the application of raised cosine and low-pass filters to signal data, 
+ * as well as the spectral analysis of filtered and non-filtered signals using FFT.
  * 
  * <h2>Usage:</h2>
  * <ol>

src/test/java/com/waveletsolutions/filtering/AppTest.java

@@ -1,4 +1,4 @@
-package com.waveletsolutions.robot;
+package com.waveletsolutions.filtering;
 
 import junit.framework.Test;
 import junit.framework.TestCase;