Issue Navigator

[FastestMolasses]

Description

Adds the Issue Navigator side menu to allow users to see the errors and warnings in their codebase.

Related Issues

• closes #354

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] The issues this PR addresses are related to each other
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] My changes are all related to the related issue above
• [x] I documented my code

Screenshots