Harvey/snapshot

[baohnguyen95]

Types of changes

• [ ] Bugfix (change which fixes an issue)
• [ x] New feature (change which adds functionality)
• [ x] Refactor (change which changes the codebase without affecting its external behavior)
• [ x] Non-breaking change (fix or feature that would causes existing functionality to work as expected)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

  Purpose

  Adding the snapshot comparison feature.

  Approach

  Added ComparisonGraph componenent.

  Resources

  Screenshot(s)