chore(release): 4.0.0

[github-actions]

🤖 I have created a release beep boop

4.0.0 (2026-01-25)

⚠ BREAKING CHANGES

• rename all generic language codes to BCP 47 locale-specific codes (#242)
• es: split Spanish into locale-specific variants (#241)
• remove index.js barrel, use subpath exports only (#235)
• rename toWords to toCardinal, form-agnostic architecture (#234)
• lang: split English into en-GB and en-US with extended scales and options (#232)
• ESM-first browser bundles (#225)

Features

• add 14 English locale variants (#255) (1b87dd9)
• de-DE: add toOrdinal and toCurrency functions (#245) (59d13fb)
• en-GB: add toOrdinal and toCurrency functions (#243) (c651780)
• en-US: add toCurrency function for currency words (#237) (44243b7)
• en-US: add toOrdinal function for ordinal number words (#233) (4db67bf)
• ESM-first browser bundles (#225) (e97d895)
• es: split Spanish into locale-specific variants (#241) (d301733)
• fr-FR: add toOrdinal and toCurrency functions (#246) (b95e513)
• it-IT: add toOrdinal and toCurrency functions (#247) (93ea3eb)
• lang: split English into en-GB and en-US with extended scales and options (#232) (8e4a0df)
• nl-NL: add toOrdinal and toCurrency functions (#249) (abcac65)
• pt-PT: add toOrdinal and toCurrency functions (#248) (0d7d972)
• ru-RU: add toOrdinal and toCurrency functions (#244) (86ad7a3)

Bug Fixes

• deps-dev: update dependencies to resolve tar vulnerability (#230) (1f86240)
• es-MX,fa-IR: correct number scale implementations (#250) (ab05310)

Code Refactoring

• remove index.js barrel, use subpath exports only (#235) (782768b)
• rename all generic language codes to BCP 47 locale-specific codes (#242) (8a8328d)
• rename toWords to toCardinal, form-agnostic architecture (#234) (1648e1a)

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