fs: add Stat() and ReadFile() proxies

[deepsource-io[bot]]

Here's the code health analysis summary for commits 0e1b018..63af72f. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Shell	✅ Success		View Check ↗
Go	✅ Success		View Check ↗

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[amery]

darvaza.org/x/fs@v0.2.7 tagged