Add 1984 Theme

[chenmijiang]

As a big fan of the Cyberpunk theme, I've adapted juanmnl's 1984 theme for Zed's UI. more details

[cla-bot]

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[chenmijiang]

@cla-bot check

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[chenmijiang]

Fixed the problem

[Copilot]

Pull Request Overview

Adds a new 1984 theme extension to the Zed editor, inspired by the Cyberpunk aesthetic and adapted from juanmnl's original 1984 theme.

• Adds the 1984 theme as a git submodule pointing to chenmijiang/zed-1984 repository
• Registers the extension in the extensions configuration with version 0.0.1
• Configures git submodule setup for the new theme extension

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
extensions/1984	Adds git submodule for the 1984 theme extension
extensions.toml	Registers the 1984 extension with version 0.0.1
.gitmodules	Configures git submodule URL and path for the 1984 extension

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