Integrate Station Core

[juliangruber]

Depends on CheckerNetwork/node#100

[bajtos]

I think the current version is good enough. 👏🏻

A few places can be improved (see the unresolved threads and the top-level comments), but none is critical.

[juliangruber]

Error: ENOENT: no such file or directory, access '/Users/bajtos/Library/Application Support/app.filstation.desktop/logs/activity.log'

@bajtos I know what's causing this :D

if (isDev) {
  // Do not preserve old Activity entries in development mode
  (async () => {
    await fs.unlink(await getActivityFilePath())
    // eslint-disable-next-line @typescript-eslint/no-empty-function
  })().catch(() => {})
}

We have to overwrite the file with empty content, not remove it