Filter archetype template pom so dep versions track the build

The flowable-archetype-unittest template pinned flowable-engine and the
third-party test deps (JUnit, AssertJ, H2, SLF4J) as literal versions,
requiring a manual edit on every release and letting those versions
drift from what the rest of the repo uses. Enable resource filtering
scoped to archetype-resources/pom.xml with the @...@ delimiter
(useDefaultDelimiters=false) so Velocity's ${...} placeholders are left
intact, and replace the hardcoded values with @project.version@,
@junit.jupiter.version@, @assertj.version@, @h2.version@, and
@slf4j.version@.

Author: filiphr

tooling/archetypes/flowable-archetype-unittest/pom.xml

@@ -12,5 +12,35 @@
   <name>Flowable - Archetype Unit Test</name>
   <artifactId>flowable-archetype-unittest</artifactId>
   <description>Creates a new Flowable unit test.</description>
-  <packaging>jar</packaging>  
+  <packaging>jar</packaging>
+
+  <build>
+    <resources>
+      <resource>
+        <directory>src/main/resources</directory>
+        <filtering>true</filtering>
+        <includes>
+          <include>archetype-resources/pom.xml</include>
+        </includes>
+      </resource>
+      <resource>
+        <directory>src/main/resources</directory>
+        <filtering>false</filtering>
+        <excludes>
+          <exclude>archetype-resources/pom.xml</exclude>
+        </excludes>
+      </resource>
+    </resources>
+    <plugins>
+      <plugin>
+        <artifactId>maven-resources-plugin</artifactId>
+        <configuration>
+          <delimiters>
+            <delimiter>@</delimiter>
+          </delimiters>
+          <useDefaultDelimiters>false</useDefaultDelimiters>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
 </project>

tooling/archetypes/flowable-archetype-unittest/src/main/resources/archetype-resources/pom.xml

@@ -10,30 +10,30 @@
 		<dependency>
 			<groupId>org.flowable</groupId>
 			<artifactId>flowable-engine</artifactId>
-			<version>8.1.0-SNAPSHOT</version>
+			<version>@project.version@</version>
 		</dependency>
 		<dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>5.13.4</version>
+            <version>@junit.jupiter.version@</version>
             <scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.assertj</groupId>
 			<artifactId>assertj-core</artifactId>
-			<version>3.27.4</version>
+			<version>@assertj.version@</version>
             <scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>
-			<version>2.3.232</version>
+			<version>@h2.version@</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-reload4j</artifactId>
-			<version>2.0.17</version>
+			<version>@slf4j.version@</version>
 		</dependency>
 	</dependencies>