Translating the text in the Shopify App

## What is the issue?

In the frontend, the text needs to be translated using `i18n` for React.

### User story

As a merchant, I want to be able to use the Greenstand Wallet Extension in any language, so that I can freely and accessibly use it.

### Target languages

Current target languages:

- French
- German
- Spanish

### Translation document

This is the translation document: https://docs.google.com/document/d/1Vzg-mKNldHJuWF9lXf4ttX8jgVr13TR2c7bzs8EhFBM/edit

## Get help

- Documentation for `react-i18n`: https://react.i18next.com/
- Ask here
- Message Krithin Jay on Slack

### Note

**Please** make sure that the translations are accurate! I suggest using a tool like DeepL for translation, or even better, if you are a native speaker.

Install DeepL: https://www.deepl.com/en/translator