Fix empty JaCoCo aggregate report

The JaCoCo aggregate report was empty because the aggregator POM lacked
dependencies on the modules it was supposed to report on.

This change introduces a dedicated `org.moreunit.report` module that
handles the aggregation by explicitly depending on the core functional
modules (`org.moreunit.core`, `org.moreunit`, `org.moreunit.mock`).
The aggregate report is still output to the location expected by the CI
workflow: `org.moreunit.build/target/site/jacoco-aggregate/jacoco.xml`.

Changes:
- Created `org.moreunit.report/pom.xml` with coverage aggregation logic.
- Registered the new module in `org.moreunit.build/pom.xml`.
- Removed the non-functional `report-aggregate` goal from the aggregator POM.

Co-authored-by: RoiSoleil <3462260+RoiSoleil@users.noreply.github.com>

Author: google-labs-jules[bot]

org.moreunit.build/pom.xml

@@ -20,6 +20,7 @@
     <module>../org.moreunit.mock.feature</module>
     <module>../org.moreunit.swtbot.test</module>
     <module>../org.moreunit.updatesite</module>
+    <module>../org.moreunit.report</module>
   </modules>
 
   <properties>
@@ -305,18 +306,6 @@
                   <destFile>${project.build.directory}/jacoco-all.exec</destFile>
                 </configuration>
               </execution>
-              <execution>
-                <id>report-aggregate</id>
-                <phase>verify</phase>
-                <goals>
-                  <goal>report-aggregate</goal>
-                </goals>
-                <inherited>false</inherited>
-                <configuration>
-                  <dataFile>${project.build.directory}/jacoco-all.exec</dataFile>
-                  <outputDirectory>${project.build.directory}/site/jacoco-aggregate</outputDirectory>
-                </configuration>
-              </execution>
             </executions>
           </plugin>
         </plugins>

org.moreunit.report/pom.xml

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <relativePath>../org.moreunit.build/pom.xml</relativePath>
+    <groupId>org.moreunit</groupId>
+    <artifactId>moreunit</artifactId>
+    <version>3.4.1-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>org.moreunit.report</artifactId>
+  <packaging>pom</packaging>
+
+  <name>${project.artifactId}</name>
+
+  <profiles>
+    <profile>
+      <id>coverage</id>
+      <dependencies>
+        <dependency>
+          <groupId>org.moreunit</groupId>
+          <artifactId>org.moreunit.core</artifactId>
+          <version>${project.version}</version>
+        </dependency>
+        <dependency>
+          <groupId>org.moreunit.plugins</groupId>
+          <artifactId>org.moreunit</artifactId>
+          <version>${project.version}</version>
+        </dependency>
+        <dependency>
+          <groupId>org.moreunit.plugins</groupId>
+          <artifactId>org.moreunit.mock</artifactId>
+          <version>${project.version}</version>
+        </dependency>
+      </dependencies>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.jacoco</groupId>
+            <artifactId>jacoco-maven-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>report-aggregate</id>
+                <phase>verify</phase>
+                <goals>
+                  <goal>report-aggregate</goal>
+                </goals>
+                <configuration>
+                  <outputDirectory>${project.basedir}/../org.moreunit.build/target/site/jacoco-aggregate</outputDirectory>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
+
+</project>

org.moreunit.updatesite/pom.xml

@@ -15,4 +15,5 @@
 
   <name>${project.artifactId}</name>
 
+
 </project>