feat(i18n): add Hindi (hi-IN) language support

[adityagupta0251]

feat(i18n): add Hindi (hi-IN) language support
📖 Description
Current Limitation

The Asgardeo JavaScript SDK currently does not support Hindi (हिन्दी – hi-IN).
Users preferring Hindi cannot see translated UI components, which limits accessibility for Hindi-speaking users.

Suggested Improvement

This PR adds Hindi (hi-IN) language support to the @asgardeo/i18n package.

⚙️ Implementation Details

New locale file:
packages/i18n/src/locales/hi-IN.ts

Translations provided for all UI components, including:

Sign-in / Sign-out

Dashboard

Profile

Other common authentication flows

Structure aligned with en-US.ts (including block comments).

Updated i18n configuration to register hi-IN as a supported locale.

Documentation updated to reference hi-IN.

✅ Checklist

Verified translations are accurate and culturally appropriate

Locale file structured with block comments aligned to en-US.ts

Package builds successfully with new locale

Confirmed no duplicate keys exist in translations

📦 Related Packages

@asgardeo/react

@asgardeo/nextjs

🙏 Notes for Reviewers

Please validate that translations render correctly in UI components.

Feedback on phrasing, terminology, or cultural accuracy is highly appreciated.

[adityagupta0251]

@brionmario Hope it finds you well 🍀

[brionmario]

@brionmario Hope it finds you well 🍀

Still the formatting is not aligning to the existing coding style.

Have you installed ESLint & Prettier plugins and tried fixing the lint issues?
As mentioned in the previous PR, this can be done easily with VSCode.

cmd+shift+p -> ESLint: Fix all

Please have a look at the existing en-US: https://github.com/asgardeo/javascript/blob/6f49213b60f51a85109de66dc0d12a25668bca93/packages/javascript/src/i18n/en-US.ts

Also, lets keep the existing PR template: https://github.com/asgardeo/javascript/blob/main/.github/pull_request_template.md

[brionmario]

As mentioned in #183 (comment), these can be auto-fixed.

Suggested change

	import { I18nTranslations, I18nMetadata, I18nBundle } from "../models/i18n";
	'elements.buttons.signIn': 'साइन इन',

Suggested change

	import { I18nTranslations, I18nMetadata, I18nBundle } from "../models/i18n";
	import {I18nTranslations, I18nMetadata, I18nBundle} from "../models/i18n";

[brionmario]

We use single quotes.
As mentioned in #183 (comment), these can be auto-fixed.

Suggested change

	"elements.buttons.signIn": "साइन इन",
	'elements.buttons.signIn': 'साइन इन',