Fix horizontal scrolling

[gordonmurray]

Summary

Fixes #2 - Adds horizontal scrolling for tables with many columns while maintaining the clean UI layout.

Changes

• Enable horizontal scrolling within table container when content exceeds width
• Tables expand to natural width while staying contained
• Added minimum column widths to prevent squashing
• Headers remain visible with sticky positioning during scroll

Testing

Tested with datasets containing 20+ columns to verify scrolling behavior.