This PR reenables code signing and notarization on macOS.
[ci no changelog needed]
# Important Notes
* electron-builder has been bumped, mostly to avoid missing Python issue. A workaround for a regression with Windows installer is provided as a patch.
This PR reenables code signing on Windows.
Each Windows package built on CI should be now signed.
Additionally, some refactorings were done around electron-builder config, so it is easier to use outside the build script and offers more configuration options.
This PR replaces webpack with esbuild, as our bundler.
The change leads to out-of-the-box ~5x improvement in bundling times, reducing the latency in watch-based workflows.
Along with this a new development server (with live reload capacity) has been introduced to support watch command.
[ci no changelog needed]
### Important Notes
* workflow for checking docs has been removed because it was using outdated prettier version and caused troubles; while the same check is performed in a better way by the GUI/Lint job.
* introduced little more typescript in the scripts in place of js, usually with minimal changes.
