Merge pull request #135 from wingo/filesystem-io #588

Job	Run time
Build C tests (windows-latest)	36s
Build Rust tests (ubuntu-latest)	54s
Build Assemblyscript tests (macos-latest)	18s
Build Assemblyscript tests (windows-11-arm)	22s
Build Rust tests (windows-11-arm)	1m 22s
Build Assemblyscript tests (windows-latest)	20s
Build Assemblyscript tests (ubuntu-latest)	16s
Build C tests (ubuntu-latest)	9s
Build Rust tests (macos-latest)	1m 14s
Build C tests (windows-11-arm)	1m 0s
Build Rust tests (windows-latest)	48s
Build C tests (macos-latest)	12s
Run tests (macos-latest, wasmtime)	26s
upload_test_binaries	15s
Run tests (windows-latest, wasmtime)	44s
Run tests (windows-11-arm, wasmtime)	46s
Run tests (ubuntu-latest, wasmtime)	22s
	10m 4s

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