Added 2 new themes

[secretSocrates]

Describe your changes

Added 2 new themes, "Cyberpunk" and "Cookies 'n' Cream", to the themes.js file

Issue ticket number and link

29

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue

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