BAEL-4174: Java Modularity and Unit Testing (#13805)

* feat: Added two main modules

* feat: Renamed test module

* feat: Added scripts for compiling library modules

* feat: Added scripts for running core module

* feat: Added scripts for running test module

* fix: Fixed module name

* fix: Removed unnecessary module imports

* feat: Added script for running tests with patch

* fix: Remove unnecessary module path imports

* feat: Script for simple classpath tests

* fix: Updated output directory

* fix: Updated output directory for test compilation

* fix: Replace maven repository with local lib folder

* feat: Add lib folder

* feat: Update the scripts

* fix: Remove pom from test module

* fix: Update core pom dependencies

* fix: Remove test module from a parent pom

* fix: Removed jars and added a script

* fix: Fix a script

* fix: Fix pom conflict

core-java-modules/core-java-9-jigsaw/pom.xml

@@ -5,6 +5,10 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>core-java-9-jigsaw</artifactId>
     <name>core-java-9-jigsaw</name>
+    <packaging>pom</packaging>
+    <modules>
+        <module>library-core</module>
+    </modules>
 
     <parent>
         <groupId>com.baeldung</groupId>