feat: Combine color attributes into light/dark mode custom Tailwind classes (#751)

[BatatiDE]

Summary

This PR addresses issue #751 by combining light and dark mode Tailwind classes into unified custom classes.

Changes

• Created brand classes in frontend/assets/css/tailwind.css, such as text-brand, bg-brand, and border-brand
• Applied the new brand classes across components and pages to replace repetitive classes
• Improved maintainability of light/dark mode styles

Testing

• Verified styles in both light and dark modes
• Confirmed updated classes are applied consistently across the platform

Related Issue

Closes #751

[github-actions]

Thank you for the pull request!

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Maintainer checklist

• The TypeScript and formatting workflows within the PR checks do not indicate new errors in the files changed

• The Playwright end to end and Zap penetration tests have been ran and are passing (if necessary)

• The CHANGELOG has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)

[github-actions]

First PR Commit Check

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  • The contributor's name and icon in remote commits should be the same as what appears in the PR
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[andrewtavis]

Hi @BatatiDE 👋 Sorry, but the issue you've opened this for is going to be closed as we're taking a different direction with this. Appreciate the interest in the platform!