v2: Stopwatch doesn't default to 1 second as documented

[jm8]

Describe the bug
In v2, creating a stopwatch with stopwatch.New() (and no stopwatch.WithInterval argument) creates a stopwatch with an interval of 0, which causes some problems as the elapsed time never increases.

Source Code

bubbles/stopwatch/stopwatch.go

Lines 65 to 75 in 84a82df

	// New creates a new stopwatch with 1s interval.
	func New(opts ...Option) Model {
	m := Model{
	id: nextID(),
	}
	for _, opt := range opts {
	opt(&m)
	}
	return m
	}

Expected behavior
According to the documentation, the interval should default to 1 second.

[mexirica]

Hi, can i work on this?