added examples of workbooks to visualize alerts and key metrics

[cassiekays]

Overview/Summary

added examples of workbooks to visualize alerts in azure and visualize ExpressRoute networking metrics.

This PR fixes/adds/changes/removes

1. adds info to workbooks section of visualizations
   
   
   

Breaking Changes

1. none

As part of this Pull Request I have

• [x ] Read the Contribution Guide and ensured this PR is compliant with the guide
• [ x] Checked for duplicate Pull Requests
• [ x] Associated it with relevant GitHub Issues or ADO Work Items (Internal Only)
• [x ] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [ x] Ensured PR tests are passing
• [ x] Updated relevant and associated documentation (e.g. Contribution Guide, Docs etc.)