Halloween theme! (PR Preview Example)

[WhyPenguins]

Description

Makes SplashKit Online have a Halloween theme! Also demonstrates how now PRs can be easily tested out online.

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as
  expected)

How Has This Been Tested?

(Honestly it hasn't been, but it will be soon!)

Testing Checklist

• Tested in latest Chrome
• Tested in latest Safari
• Tested in latest Firefox

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 in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have requested a review from ... on the Pull Request

[github-actions]

🐋 PR Preview!
Preview at https://thoth-tech.github.io/SplashkitOnline/pr-previews/96
for commit 9311037