Add dracula-by-gerson extension

[GersonDantas]

Adds the Dracula by Gerson theme extension.

Extension repository:
https://github.com/GersonDantas/Custom-Dracula

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[GersonDantas]

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[cla-bot]

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[MrSubidubi]

Thanks for this!

Please make sure your extension fulfills the extension publishing prerequisites. Particularly, you will need to update your extension ID as outlined in the documentation. Once you did the necessary updates, please update everything related here.

Furthermore, please elaborate on how this differs from existing dracula variants.

[GersonDantas]

Thanks for the review.

At first, this started as a personal customization of the Dracula themes I found in Zed. As I kept refining the colors, contrast, editor surfaces, active states, and syntax tones, the theme gradually became more focused on visual comfort than on being another direct Dracula variant.

I also started using a light theme again during the day, which led me to look for palettes that felt comfortable in both light and dark environments. That is what brought me to the new name: Haven. The goal is to make the theme feel like a visual refuge while coding.

I updated the extension ID to haven-theme, renamed the extension to Haven, updated the repository URL, refreshed the README in English, added screenshots for each theme variant, and documented how I configure Zed to follow the system theme with a light theme during the day and a dark theme at night.

I also expanded the README to explain how Haven differs from existing Dracula variants: it keeps Dracula as an inspiration, but it focuses on a softer day-to-night editing experience with teal, orange, and warm variants across dark, light, and solid modes.

Local validation passes with pnpm test.