refactor: css improvements

[ethanluc7]

Summary

Improves UI styling and layout across various components such as the Table, Dropdown and EntityRelationshipDiagram components.

Description of Changes

• Dropdown: Prevent dropdowns from stretching to fill parent width by adding align-self: flex-start, width: fit-content, and max-width: 100%
• Modal: Increase max height from 80vh to 100vh to use full viewport
• Diagram Modal: Increase diagram container height from 50vh to 65vh for better visibility
• Table columns: Fix inconsistent first-column sizing by adding explicit width: 325px to both TableHeader and TableRow sticky columns
• ERD layout: Swap sugiyama center nodes in mapping for improved diagram readability

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
  • Autmated 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

[JamesTLopez]

LGTM!