#394: Diagram View Modal

[ethanluc7]

Related to issue: #394

Summary

Creates a diagram view button that opens a diagram modal. Also updates the modal component to take in an optional prop subtitle and updates related stories accordingly.

Description of Changes

• Creates new DiagramViewButton component that opens a modal when pressed
• Adds optional prop subtitle? to modal component
• Creates story for DiagramViewButton component with default and loading states
• Adds DiagramViewButton to Toolbar.tsx

Readiness Checklist

• Self Review
  • I have performed a self review of code
  • I have run the application locally and manually tested the feature
  • I have checked all updates to correct typos and misspellings
• Formatting
  • Code follows the project style guide
  • Automated code formatters (ie. Prettier) have been run
• Local Testing
  • Successfully built all packages locally
  • Successfully ran all test suites, all unit and integration tests pass
• Updated Tests
  • Unit and integration tests have been added that describe the bug that was fixed or the features that were added
• Documentation
  • All new environment variables added to .env.schema file and documented in the README
  • All changes to server HTTP endpoints have open-api documentation
  • All new functions exported from their module have TSDoc comment documentation