feat: add Maven config to build a fat jar

pom.xml

@@ -7,7 +7,7 @@
 
     <groupId>de.swingbe.ifleet</groupId>
     <artifactId>tgp</artifactId>
-    <version>0.0.3</version>
+    <version>0.0.4</version>
 
     <description>
         This project is a library for parsing ifleet telegrams in Java.
@@ -242,5 +242,26 @@
                 </plugin>
             </plugins>
         </pluginManagement>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <version>3.3.0</version>
+                <configuration>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
     </build>
 </project>