fix: use cache directory in users home instead of system-wide tmp dir

[bc-bzt]

fix #89

[robertsLando]

I would re-use the same cache path used in sea:

pkg/lib/sea.ts

Line 274 in a886214

const downloadDir = join(homedir(), '.pkg-cache', 'sea');

Cosider moving it to a constant that is shared

[robertsLando]

See comment

[robertsLando]

Cosider moving it to a constant that is shared