[exercise] Expand dashboard to visualize Error Budget

[tylerauerbeck]

📝 Description

After establishing our Error Budget (EB) and Error Budget policy, we should look to further visualize our EB process by adding it to both our dashboards and alerting

✅ A/Cs

• Expand our previously created dashboard to add EB information
• Add simple alerting in order to make team aware of EB violations.

[jdandrea]

Is the EB already established or is it meant to be a different task?

[tylerauerbeck]

Depends on #13