Fix(Client): Clarify Progress Reset Modal

[RavidYael]

Checklist:

• I have read and followed the contribution guidelines.
• I have read and followed the how to open a pull request guide.
• My pull request targets the main branch of freeCodeCamp.
• I have tested these changes either locally on my machine, or GitPod.

Overview

This pull request closes Issue #53959 through the implementation of a new reset modal as discussed, including a mechanism for backward compatibility for languages yet to receive updates for the new modal translations.

Changes

• Translations: New key-value pairs have been added to translations.json for enhanced clarity in the modal's messaging.
• Component Architecture: NewResetModal and OldResetModal components have been created, segregating the new modal's functionality from the existing one.
• Rendering Logic: A ResetModalRenderer component is implemented to selectively render modals based on translation availability.

Backward Compatibility

• Translation Existence Check: ResetModalRenderer utilizes i18n keys to verify the presence of new modal translations.
• Fallback to Legacy Modal: In the absence of new translations, the old modal is rendered, preserving the user experience.
• Progressive Translation Updates: This dual-modal system enables incremental translation updates without disrupting user functionality.

Updated Reset Modal Interface

• Here's how the new reset modal looks in the local development environment, reflecting the latest UI updates as discussed in the issue.

[huyenltnguyen]

@RavidYael Thank you for the PR.

There are a couple of things we need to address:

• The changes should be applied directly to the existing modal, meaning there shouldn't be a new one and an old one
• Modal should be from @freecodecamp/ui, rather than @freecodecamp/react-bootstrap
• Custom styles need to be minimal (we do want to keep the UI consistent across pages). And if there is a need for custom styles, the CSS code has to be in a CSS file rather than being applied inline

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You're welcome to apply the changes, but note that we are in the process of migrating the Modal component (#52759), and we'll need to block this PR until the migration is complete.

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