Decrease package sizes

[lidel]

Our packages ballooned in size:

• ipfs-desktop-0.12.2-linux-x64.tar.xz 77.6 MB
• ipfs-desktop-0.13.0-linux-x64.tar.xz - 295 MB

The main offender is app.asar, which in the past had similar size to app.asar.unpacked:

ipfs-desktop-0.12.2-linux-x64/resources:
   57.3 MiB [##########]  app.asar
   52.6 MiB [######### ] /app.asar.unpacked

and now seems to have more than it should:

ipfs-desktop-0.13.0-linux-x64/resources:
  264.8 MiB [##########]  app.asar
   56.7 MiB [##        ] /app.asar.unpacked

For some reason app.asar includes entire project root, not just node_modules/go-ipfs

Need to look into both, and see if we can make it smaller.

• perhaps there is a bug in latest electron-builder
• maybe we introduced a regression in feat(ci): move to GitHub Actions #1657?
  • kinda. we introduced .cache directory, it is in .gitignore but electron-builder has its own list.
    • will PR a fix shortly
• do we need both? (we effectively have two copies of go-ipfs.. why?)
  • I believe only unpacked version is used, because we want to have standalone ipfs[.exe] binary that could be used on PATH
  • It should be possible to exclude it from asar archive and add it back manually + adjust path (ideally, keep it the same), so only one copy is included (will save us 50MB+)
    • update: turns out this does not buy us much – details in fix: ensure small asar archive #1660