Add Omarchy Sync plugin

[salemsayed]

Summary

Adds Omarchy Sync (omarchy) to Themes & Appearance. It follows the active Omarchy palette and light/dark mode across BB desktop, browser, and PWA surfaces, with animated transitions, ANSI/code/diff colors, favicon tinting, and an optional theme-set hook.

The plugin deliberately detects BB’s React Native/Expo bridge and skips all theme injection on the native mobile app. It also never changes BB’s shared server palette ID, keeping mobile appearance independent.

The listing now uses Omarchy’s official high-contrast pixel-cutout icon, attributed under the upstream MIT license.

Verification

• Plugin repository release: https://github.com/salemsayed/bb-plugin-omarchy/releases/tag/v0.1.1
• Omascreen showcase: https://github.com/salemsayed/bb-plugin-omarchy/releases/download/v0.1.1/showcase.mp4
• Plugin checks: typecheck + 10 tests pass
• Live BB 0.41 Nightly install/build and v0.1.1 update verified
• Live Lupine light → Tokyo Night dark → Lupine light auto-sync verified
• Expo bridge opt-out and normal PWA injection covered by tests
• Marketplace build, 25 tests, v1 gate, screenshot/icon validation, and remote-source liveness check pass locally

No network requests are made by the plugin. The optional hook owns only ~/.config/omarchy/hooks/theme-set.d/90-bb-omarchy.