Add Norwegian Nynorsk (nn) language

[arvindfroi]

Summary

Adds Norwegian Nynorsk (nn) as a supported language. The library already ships no (Bokmål); Norway has two official written standards, and Nynorsk differs in several time units (e.g. månad/månader, veke/veker, dagar, timar), so this is a genuine addition rather than a duplicate of no.

Changes

• humanize-duration.js: new nn definition (inserted alphabetically before no).
• • test/definitions/nn.tsv: full test fixtures for nn (mirrors no.tsv).
• • README.md: added a Norwegian Nynorsk / nn row to the languages table (and relabelled the existing no row as Norwegian Bokmål for clarity) plus a credit line.

Verification

Ran the actual humanizer against all 34 nn.tsv cases locally — all pass. getSupportedLanguages() now includes nn and still matches the set of .tsv fixtures (so the get-supported-languages test stays green).

Disclosure

Prepared with AI assistance (Claude) and reviewed by a native Norwegian speaker (whose strongest dialect is Bokmål). The Nynorsk neuter plurals (minutt, sekund, millisekund unchanged) follow the official norm — happy to adjust if you'd prefer the -er variants.

[EvanHahn]

Thank you. I'll look at this in the next few weeks.

[Copilot]

Pull request overview

Adds Norwegian Nynorsk (nn) as a first-class locale alongside existing Norwegian Bokmål (no), including test fixtures and documentation updates so the new locale is exercised by the existing language test harness and discoverable via getSupportedLanguages().

Changes:

• Added a new nn language definition to the built-in LANGUAGES map.
• Introduced test/definitions/nn.tsv fixtures so nn is covered by the existing localization tests.
• Updated README.md to distinguish Bokmål vs Nynorsk and added contributor credit.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
humanize-duration.js	Adds nn locale via onesLanguage(...) so getSupportedLanguages() includes it.
test/definitions/nn.tsv	Adds nn TSV fixtures to validate locale output across units/decimals.
README.md	Documents nn and clarifies no as Bokmål; adds credit line.

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[EvanHahn]

Thanks! This has been published in humanize-duration@3.34.0.