feat(sort): add locale-aware numeric sorting support(sort-h-thousands-sep.sh)

[mattsu2020]

Implement NumericLocaleSettings to handle thousands separators and decimal points based on locale. Update tokenization logic to accommodate blank thousands separators for numeric and human-numeric modes, ensuring proper parsing of numbers with locale-specific formatting. This enhances compatibility with international number representations.

[codspeed-hq]

CodSpeed Performance Report

Merging #9848 will degrade performance by 3.4%

_{Comparing mattsu2020:sort_sort-h-thousands-sep.sh (d4e80d2) with main (3e71f63)}

Summary

❌ 1 regression
✅ 126 untouched
⏩ 6 skipped¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Efficiency
❌	sort_numeric	23.9 ms	24.7 ms	-3.4%

Footnotes

1. 6 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/sort/sort-h-thousands-sep is no longer failing!
Note: The gnu test tests/tail/tail-n0f is now being skipped but was previously passing.

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/sort/sort-stale-thread-mem. tests/sort/sort-stale-thread-mem is passing on 'main'. Maybe you have to rebase?
Congrats! The gnu test tests/sort/sort-h-thousands-sep is no longer failing!