fix: properly handle files owned by fs

[caarlos0]

closes #738

I hardcoded all the directories owned by the filesystem package, I think it should be enough for now... we can make this configurable in the future if needed.

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	1cfaeaa
Status:	✅  Deploy successful!
Preview URL:	https://80720181.nfpm.pages.dev
Branch Preview URL:	https://fs.nfpm.pages.dev

View logs

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (c2fe69e) 75.20% compared to head (1cfaeaa) 75.15%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
files/fs.go	57.14%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #760      +/-   ##
==========================================
- Coverage   75.20%   75.15%   -0.06%     
==========================================
  Files          12       13       +1     
  Lines        2468     2475       +7     
==========================================
+ Hits         1856     1860       +4     
- Misses        433      435       +2     
- Partials      179      180       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.