feat: Add SparseSet data structure - #8

Bugbot Analysis Progress (6m 49s elapsed)

✅ Gathered PR context (1s)
✅ Analyzed code changes (1s)
✅ Completed bug detection — 3 potential bugs found (5m 51s)
✅ Validation and filtering completed (0s)
✅ Posted analysis results — 3 bugs reported (56s)
✅ Analysis completed successfully (0s)

Final Result: Bugbot completed review and found 3 potential issues

Request ID: serverGenReqId_4d9c538d-4dcd-43be-9917-cb6a6583fc97