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 this PR will degrade performance by 12.65%

_{Comparing mattsu2020:sort_sort-h-thousands-sep.sh (22fa140) with main (5fd3459)}

Summary

⚡ 4 improved benchmarks
❌ 3 regressed benchmarks
✅ 275 untouched benchmarks
⏩ 38 skipped benchmarks¹

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

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	sort_long_line[160000]	1.7 ms	1.9 ms	-12.65%
⚡	Memory	sort_case_sensitive[500000]	17.4 MB	16.9 MB	+3.02%
❌	Memory	sort_reverse_locale[500000]	27.5 MB	30.5 MB	-9.82%
⚡	Memory	sort_long_line[160000]	981.4 KB	719.3 KB	+36.44%
⚡	Memory	du_deep_tree[(100, 3)]	155.8 KB	143.3 KB	+8.7%
❌	Memory	du_wide_tree[(5000, 500)]	1.2 MB	1.3 MB	-3.37%
⚡	Memory	numfmt_large_numbers_si[10000]	4.9 MB	4.7 MB	+4.01%

Footnotes

1. 38 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!

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/sort/sort-h-thousands-sep is no longer failing!

[sylvestre]

it needs tests

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/sort/sort-h-thousands-sep is no longer failing!

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/sort/sort-h-thousands-sep is no longer failing!