Add javadoc-warnings-error build plugin

Signed-off-by: rigu1 <dlsrbtla@gmail.com>

Author: Rigu1

buildSrc/src/main/groovy/javadoc-warnings-error.gradle

@@ -0,0 +1,6 @@
+import org.gradle.api.tasks.javadoc.Javadoc
+
+project.tasks.withType(Javadoc).configureEach {
+	options.addBooleanOption('Xdoclint:all', true)
+	options.addBooleanOption('Werror', true)
+}