[ANN] backoff - Backoff iterator for Go 1.23+

[MZA]

Hi all,

I've released backoff, a small package for generating backoff durations in retry loops using Go 1.23+ iterators.

Repo: https://github.com/mzattahri/backoff
Docs: https://pkg.go.dev/mz.attahri.com/code/backoff/v2

Basic usage:

```

for attempt := range backoff.Attempts(ctx, time.Second, 30*time.Second, backoff.Exponential(2), 5) {
    if err := doSomething(); err == nil {
        return nil
    }
}

return errors.New("max retries exceeded")

```

It supports linear, incremental and exponential step functions, as well as context cancelation, and jitter.

Feedback and contributions welcome!