user-idle-time 0.6.0

Get a user's idle time.
Documentation
# Objective

Describe the objective or issue this PR addresses.

If you are fixing a specific issue, simply say "Fixes #X".

## Solution

Describe the solution used to achieve the objective above.

## Testing

- Did you test these changes? If so, how?
- Are there any parts that need more testing?
- How can other people (reviewers) test your changes? Is there anything specific they need to know?
- If relevant, what platforms did you test these changes on, and are there any important ones you cannot test?

## Showcase

This section is optional. If this PR does not include a visual change or does not add a new feature, you can delete this section.

- Help others understand the result of this PR by showcasing your awesome work!
- If this PR adds a new feature or public API, consider adding a brief pseudo-code snippet of it in action
- If this PR includes a visual change, consider adding a screenshot, GIF, or video
  - If you want, you could even include a before/after comparison!
- If the Migration Guide adequately covers the changes, you can delete this section

While a showcase should aim to be brief and digestible, you can use a toggleable section to save space on longer showcases:

```rust
println!("My super cool code.");
```

## Migration Guide

This section is optional. If the PR does not include a breaking change, you can delete this section.

Describe how users can change their code to work with the new version, preferably with an example.