[Experimental] Create desktop target for web app via Electron wrapper

[ajmcquilkin]

Description

This PR is the result of a conversation the Meshtastic Discord (link) around "we need a cross-platform desktop app without significantly increasing maintenance load," which an Electron wrapper of the web client checks off in a lot of ways. This branch and (draft) PR aren't yet in a working state, but I'm publishing this mostly to get feedback on whether this would be an avenue to continue down.

Changes Made

• Adds a new packages/desktop package which wraps a built version of packages/web in an electron app
• Makes translation imports relative, as the built web app code isn't served from the root of the electron ap
• Make URL redirects relative along similar lines (not sure this is needed)
• (Temporarily) disables the Secure Context check on the web app given electron uses the file: transport and not localhost nor https:

Testing Done

None yet, this is experimental

Screenshots (if applicable)

Checklist

• Code follows project style guidelines
• Documentation has been updated or added
• Tests have been added or updated
• All i18n translation labels have been added (read
  CONTRIBUTING_I18N_DEVELOPER_GUIDE.md for more details)