Improve rendering task scheduled settings view and message

- Render crontime string in natural language in message & settings UI
- Show more fields in tasks web config UI
- Add link to the tasks settings page in task scheduled chat response
- Improve task variables names
  Rename executing_query to query_to_run. scheduling_query to
  scheduling_request

pyproject.toml

@@ -82,6 +82,7 @@ dependencies = [
     "huggingface-hub >= 0.22.2",
     "apscheduler ~= 3.10.0",
     "pytz ~= 2024.1",
+    "cron-descriptor == 1.4.3",
 ]
 dynamic = ["version"]