Add throttle operator

[DevYeom]

Related Issues 💭

Description 📝

• Add a new operator that emits elements from this effect, but only if a certain amount of time has passed between emissions.

Additional Notes 📚

enum ThrottleID {
    case button
}

func reduce(state: inout State, action: Action) -> AnyEffect<Action> {
    switch action {
    // ...
    case .perform:
        return .just(.increment)
            .throttle(id: ThrottleID.button, for: 1.0, latest: true)
    // ...
    }
}

Checklist ✅

• If it's a new feature, have appropriate unit tests been added?
• If the changes affect existing functionality, please verify whether the above information has been appropriately described.