Add `humanize.Tomorrow` that returns the start of the next day

I have this snippet to create a `time.Time` that I only need to add hours to:

```go
func tomorrow() time.Time {
	return time.Now().Add(humanize.Day).Truncate(humanize.Day) // returns 2025-07-11 00:00:00 +0000 UTC
}

// tomorrow().Add(9 * time.Hour) => 2025-07-11 09:00:00 +0000 UTC
```

Would that be something that fits into this project?