Inky compiler not working with fresh download

Hello!

Thank you so much for the great project and the resources to use it – I first saw it on YouTube and there were a lot of well-made videos for a tool that I needed that you're also providing for free!

I'm using Unity and I downloaded the Unity Integration as well as the Inky editor.

Unfortunately, after I download and open Inky, I get the compiler error here:
```
Ink compiler had an unexpected error ☹

realpath(): Permission denied
Failure processing application bundle.
Failed to determine location for extracting embedded files
DOTNET_BUNDLE_EXTRACT_BASE_DIR is not set, and a read-write temp-directory couldn't be created.
A fatal error was encountered. Could not extract contents of the bundle
```

Here's a screenshot of the editor:

I tried restarting my computer, reinstalling Inky and downloading a fresh copy of the disk image and installing a new copy again, but they all resulted in this error message.

Here are some other details:
Inky: Version 0.12.0 (I don't have a problem with Version 0.10.0 it seems)
OS: macOS 10.14.6

Thank you so much again and I hope this might help resolve the issue!

Start by reproducing the failure with a fresh Inky 0.12.0 download on macOS 10.14.6, using the reported compiler error as the entry point. Investigate the editor's compiler startup and application-bundle extraction path; done means a fresh installation compiles successfully without the permission or temporary-directory errors.

Written by the indexing model from the issue text.