docs: Add query-builder and mapper-runtime javadocs

When generating documentation website pages move also generated javadoc
for query-builder and mapper-runtime modules.
Some links in manuals attempt to link to the javadoc for those modules
and end up being broken without those javadocs included.

Author: Bouncheck

docs/_utils/javadoc.sh

@@ -15,3 +15,5 @@ mvn javadoc:javadoc
 [ -d $OUTPUT_DIR ] && rm -r $OUTPUT_DIR
 mkdir -p "$OUTPUT_DIR"
 mv -f core/target/site/apidocs/* $OUTPUT_DIR
+cp -an query-builder/target/site/apidocs/* $OUTPUT_DIR
+cp -an mapper-runtime/target/site/apidocs/* $OUTPUT_DIR