Electron desktop app wrapper

[fmaclen]

Ship Canutin as a native desktop app using Electron. The app bundles the SvelteKit SPA and the PocketBase binary (with custom Go hooks).

Requirements

• SvelteKit built with adapter-static for Electron
• Electron main process spawns PocketBase, waits for ready, loads the app
• Graceful shutdown of PocketBase on app quit
• Platform-specific builds: macOS (arm64/x64), Windows (x64), Linux (x64)
• PocketBase data stored in the OS-appropriate app data directory
• electron-builder config for DMG, EXE, tar.gz

Electron source code lives in this repo. Signed binary builds happen in a separate private repo.