Update package and class references, improve documentation, and remove outdated test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- Removed outdated AppTest.java file, which was no longer relevant

pom.xml

@@ -2,7 +2,7 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>com.waveletsolutions.robot</groupId>
+  <groupId>com.waveletsolutions.filtering</groupId>
   <artifactId>filter-view</artifactId>
   <packaging>jar</packaging>
   <version>1.0-SNAPSHOT</version>
@@ -70,7 +70,7 @@
               </execution>
           </executions>
           <configuration>
-              <mainClass>com.waveletsolutions.robot.App</mainClass>
+              <mainClass>com.waveletsolutions.filtering.App</mainClass>
           </configuration>
       </plugin>