Implements grouping of identical bins (same items in same order) to reduce
visual clutter in the results grid. Instead of showing 10 identical bins as
separate rows, they now appear as a single row with a count.
- Add BinComparer for deep equality comparison of bins
- Add BinGroup to represent grouped bins with count
- Update ResultsForm to display grouped bins in grid
- Add Count column to show how many of each bin pattern
- Maintain original bins list for file export
This improves readability when the optimizer generates multiple identical
cutting patterns.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
