build: add project description and URL to pom

Author: FedericoQuarin

pom.xml

@@ -5,6 +5,8 @@
 	<artifactId>error-window-vaadin</artifactId>
 	<version>3.6.0-SNAPSHOT</version>
 	<name>Error Window Add-on</name>
+	<description>Error handler that displays a dialog with exception information</description>
+	<url>https://www.flowingcode.com/en/open-source/</url>
 
 	<developers>
 		<developer>