chore: add cloud-rad doc generation (#1381)

Author: eaball35

pom.xml

@@ -691,5 +691,44 @@
         </plugins>
       </build>
     </profile>
+
+    <profile>
+      <id>docFX</id>
+      <activation>
+        <property>
+          <!-- Activate with -P docFX -->
+          <name>docFX</name>
+        </property>
+      </activation>
+      <reporting>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-javadoc-plugin</artifactId>
+            <version>3.2.0</version>
+            <reportSets>
+              <reportSet>
+                <id>docFX</id>
+                <reports>
+                  <report>javadoc</report>
+                  <report>aggregate</report>
+                  <report>aggregate-jar</report>
+                </reports>
+              </reportSet>
+            </reportSets>
+            <configuration>
+              <doclet>com.microsoft.doclet.DocFxDoclet</doclet>
+              <useStandardDocletOptions>false</useStandardDocletOptions>
+              <docletPath>${env.KOKORO_GFILE_DIR}/java-docfx-doclet-1.0.jar</docletPath>
+              <additionalOptions>
+                -outputpath ${project.build.directory}/docfx-yml
+                -projectname ${artifactId}
+                -excludepackages com\.google\.api\.client\.findbugs:com\.google\.api\.client\.test:com\.google\.api\.services
+              </additionalOptions>
+            </configuration>
+          </plugin>
+        </plugins>
+      </reporting>
+    </profile>
   </profiles>
 </project>