fix(string/dash): add number boundaries to dash function

[theodrosyimer]

Fix dash function to align with lodash kebabCase for number boundaries

Fixes #408

What

Enhanced dash function to treat numbers as separate tokens, enabling existing hyphenation at alphanumeric boundaries.

Why

Align with lodash kebabCase behavior where numbers are treated as distinct words.

Before / After

// Before
dash('hello123') // => 'hello123'
dash('hello123world') // => 'hello123world'

// After  
dash('hello123') // => 'hello-123'
dash('hello123world') // => 'hello-123-world'

Implementation

Split digits into separate tokens by adding (\d+) to the regex:

// Before
?.split(/(?=[A-Z])|[\.\-\s_]/)

// After
?.split(/(?=[A-Z])|(\d+)|[\.\-\s_]/)

Breaking Changes

None - existing functionality preserved.

Bundle impact

Status	File	Size 1	Difference
M	src/string/dash.ts	342	+8 (+2%)

Footnotes

1. Function size includes the import dependencies of the function. ↩

[radashi-bot]

Benchmark Results

Name	Current	Baseline	Change
dash ▶︎ with valid input	1,040,489.67 ops/sec ±0.37%	1,501,962.22 ops/sec ±0.68% 🔗	🐢 -30.72%

Performance regressions of 30% or more should be investigated, unless they were anticipated. Smaller regressions may be due to normal variability, as we don't use dedicated CI infrastructure.