feat: added comments and readme

spring-boot-common-utils/pom.xml

@@ -14,14 +14,11 @@
     <relativePath>../pom.xml</relativePath>
   </parent>
 
+  <!--
+  These projects only need an artifact id. The version and group id are taken from the parent.
+  -->
   <artifactId>spring-boot-common-utils</artifactId>
 
-  <properties>
-    <maven.compiler.source>17</maven.compiler.source>
-    <maven.compiler.target>17</maven.compiler.target>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-
   <dependencies>
     <dependency>
       <groupId>org.projectlombok</groupId>