chore: add GG-Plugin-Class to manifest (#79)

Author: MikeDombo

pom.xml

@@ -115,6 +115,18 @@
     </dependencies>
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.3.0</version>
+                <configuration>
+                    <archive>
+                        <manifestEntries>
+                            <GG-Plugin-Class>com.aws.greengrass.mqtt.bridge.MQTTBridge</GG-Plugin-Class>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>