Desktop/smartphone app bundler

[whitphx]

• Universal: PWA (already)
• Desktop: Electron/Tauri
  • This may contribute to https://github.com/streamlit/streamlit/issues/1370
  • Electron looks better
    • It has Web Workers support
    • It has browser and NodeJS runtime
    • Tauri seems to be a "web-based UI framework on Rust" on which the web technology is for UI and Rust for the main process.
      • It seems that Tauri does not have a runtime where Pyodide runs.
  • Package name: @stlite/desktop
• Mobile: Capacitor

[whitphx]

2 directions for the Electron app:

1. Create a new app at the same level as mountable and playground and build it from scratch ( #295)
2. Create a separate project and use @stlite/mountable on it.

For 1.,

• Build step seems to be easier because it would be like the ones in mountable and sharing
• Electron-forge does not work well, probably because of yarn workspace

For 2.,

• Scaffolding with Electron-Forge works well
• Using @stlite/mountable looks hard because all the static files have to be imported and bundled again.

[whitphx]

PWA and Desktop app are done. I made a new issue about the mobile apps: #390, so close this issue.