Feature: Added the first version of the dracula dark theme

[aidanjmaunder]

Description

I've built out a new dark theme called Dracula, based on the https://draculatheme.com color palette, I had to tweak the colors a bit from their palette to make sure things would contrast hard enough for accessibility purposes.

Fixes #

Type of change

• [] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

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[aidanjmaunder]

I have read the CLA Document and I hereby sign the CLA

[github-actions]

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