Hello,

I recently came across this project and was wondering if you had any more examples that might use some of the other finctions?

fs.GlobFS
fs.ReadDirFS as well as to how you fs.WriteDirFS
fs.StatFS
fs.SubFS

I am also particularly interested in reading/writing directories and putting files within those directories as wells as getting statfs on the filesystem total, fora directory, and file so that I can learn how it is done.

Thanks

Add an implementation that does not read content for a file into memory until required.

Thanks for a great library.

In my use case, I needed to inject an any value into ModTime, so I made the following modifications.
The default value is set to time.Now(), so backward compatibility is not broken.
yktakaha4@2fcb18e

// SetTimeProvider set function to mock generation of current time (default: time.Now())
func (m *FS) SetTimeProvider(provider func() time.Time) {
	m.context.provideTime = provider
}

// Usage
mfs := New()

t1 := time.Date(2112, 9, 3, 12, 34, 56, 321, time.UTC)
mfs.SetTimeProvider(func() time.Time {
	return t1
})

err = mfs.WriteFile("test.txt", []byte("content"), 0o644)
assert.NoError(t, err)

stat, err = mfs.Stat("test.txt")
assert.NoError(t, err)
assert.Equal(t, t1, stat.ModTime())

Would this change be appropriate for this library?
If no problem, I would like to create a pull request.