Add Hearth theme to theme collection

[ryanfurrer]

Pull Request Template

Discord username (optional)

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Name of theme

Hearth

How Has This Been Tested?

I created the theme files, added them to my ./warp/themes folder and confirmed they worked and looked as expected. Also yes, I ran the python script.

Have you run the python script? python3 ./scripts/gen_theme_previews.py <folder-name-eg-standard>

Notes

We cannot accept pull request that include custom background images because:

• of licensing restrictions
• we are trying to keep the binary size of the repo as small as possible (just the yaml files)

If your theme has an intended custom background image, include a comment in the yaml with a link to where people should download it.

N/A