Add instructions on topic monitoring

[xmfcx]

Checklist

• I've read the contribution guidelines.
• I've searched other issues and no duplicate issues were found.
• I've agreed with the maintainers that I can plan this task.

Description

Closes: autowarefoundation/autoware_universe#1253

autowarefoundation/autoware_universe#1253 (comment)

Purpose

autowarefoundation/autoware_universe#1253 (comment)

Possible approaches

autowarefoundation/autoware_universe#1253 (comment)

Definition of done

autowarefoundation/autoware_universe#1253 (comment)

[mitsudome-r]

I've started working on this.
I am planning to add description about the error handling modules (monitors, system_error_monitor, and emergency_handler). Then, I will also explain a procedure to modify configuration file to add any additional topic/node monitoring.

[stale]

This pull request has been automatically marked as stale because it has not had recent activity.