Remove currency conversion

[vatsaaaal]

Description

This pull request removes the currency conversion feature from the project, which includes:

• Removing all frontend, backend, and API files related to the currency converter.
• Removing the test files associated with the currency converter.
• Removing the 'forex-python' dependency from the 'pyproject.toml' file.
• Running 'poetry update' to update dependencies.

Motivation

The currency conversion feature was deemed to have no significant purpose and caused more hassle than benefit, as per issue #460 .

Dependencies

No new dependencies are required for this change.

Checklist

• [x] Ran the Black Formatter and djLint-er on any new code (checks will fail without)
• [x] Made any changes or additions to the documentation where required
• [x] Changes generate no new warnings/errors
• [x] New and existing unit tests pass locally with my changes

What type of PR is this?

• 🐛 Bug Fix
• ♻️ Code Refactor

Added/updated tests?

• 🙅 no, because they aren't needed

Related PRs, Issues etc

• Closes #460

[TreyWW]

Hey @vatsaaaal,

Welcome to the project, and thanks for the contribution! I'll review (+ hopefully merge) the PR tomorrow afternoon, I've got a few things planned for the morning

[vatsaaaal]

Thank you. Sounds good @TreyWW !

[TreyWW]

Apologies for the delay, I went away and didn't have a chance to review this before. I'm back now, just going to finish my PR then I'll get back to this. Hopefully within the next 2 days. Thanks again for the contribution and patience

[vatsaaaal]

Okay, no worries.

[TreyWW]

Thanks again for the PR, really appreciate it! 💜