Local plugins are reset on application exit

[shiro]

• App version:
  figma-linux 0.9.6-0
• System
  Arch Linux x86_64
• Type of installed package (Snap, AppImage, deb, rpm, pacman):
  pacman (AUR)

Bug description

Recently Figma changed the plugin UI a bit, and with that probably some method names which causes local plugins to no longer be loaded on restart. This means the changes introduced by #126 are no longer valid (the my_plugins page is now blank for example).

Additional context
Probably can be solved by checking what messages Figma sends and update the API to handle it, but idk anything about it, just a guess :)