feat(sort): implement comb sort

[gian-gg]

Description

This PR adds full Comb Sort support to the sorting visualizer.

Changes included:

• Added CombSortPage with step-by-step Comb Sort animation using a shrinking gap sequence(/=1.3) until gap = 1 and no swaps remain.
• Added Comb Sort route handling in src/App.tsx.
• Added Comb Sort metadata entry in src/algorithms/index.ts and marked it as implemented.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have checked that my commit message follows conventional commits

Preview:

comb-sort-preview.mov