[UMBRELLA ☂️] chore: expand Language Support (`i18n`) for Better Global Accessibility

> [!Important]
> Contributors for this task should be native speakers or have professional fluency in the target language to ensure accurate, culturally appropriate translations.

> [!Note]
> **This issue can be taken by multiple contributors!**
> Please comment below with the language you would like to contribute with.

### Current Limitation

Currently, the Asgardeo JavaScript SDK only supports **English 🇺🇸 by default**. We need to add comprehensive language support to improve internationalization coverage for React UI components.

### 🌍 How to Contribute

To contribute a language:
1. **Comment below** with the language you'd like to contribute (e.g., "I'd like to contribute Spanish translations")
2. We'll assign you to that specific language in the table below
3. You can work on your language independently

### Language Support Status

Please check the `Sub-issues` section 👇

### Please select the package issue is related to

@asgardeo/javascript

### Version

current

### Reporter Checklist

- [x] I have searched the existing issues and this is not a duplicate.
- [x] I have provided all the necessary information.
- [x] I have verified the improvement is not available in the latest version of the package.

Beginne mit der Durchsicht des Abschnitts Sub-issues und des Pakets @asgardeo/javascript, kommentiere dann mit der Sprache, zu der du beitragen möchtest, und bestätige deren Zuweisung. Erledigt bedeutet, genaue, kulturell angemessene Übersetzungen für diese Sprache in allen React UI-Komponenten hinzuzufügen.

Vom Indexierungsmodell aus dem Issue-Text verfasst.