[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.

まず Sub-issues セクションと @asgardeo/javascript パッケージを確認し、その後、貢献したい言語をコメントで伝えて、割り当てを確認してください。完了とは、その言語について、React UI コンポーネント全体に正確で文化的に適切な翻訳を追加することです。

索引モデルが issue の本文から書いたものです。