Convert site to Hugo (#8316)

This commit converts content and layout to use Hugo.

content/en/docs/tasks/job/coarse-parallel-processing-work-queue/worker.py

@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+
+# Just prints standard out and sleeps for 10 seconds.
+import sys
+import time
+print("Processing " + sys.stdin.lines())
+time.sleep(10)