Initialized i18n and added Spanish support to cases page

[darkshredder]

Feature

Feature #99 by @darkshredder

Description

This pull request initializes the support of i18n for internationalization and localization of our application. It has also added support of spanish language in cases page of the project.

Tests

• Install firefox extensions like Language Switch where we can switch between languages of our visiting page.

• Using it on /cases url and switching to spanish.

• We can see spanish is written on that page

Screenshots

Checklist

• [x] My pull request has a descriptive title (not a vague title like Update index.md).
• [x] My pull request targets the default branch of the repository (main or master).
• [x] My commit messages follow best practices.
• [x] My code follows the established code style of the repository.
• [x] I tried running the project locally and verified that there are no visible errors.

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