feat: pause/resume timer

[ken7253]

This Pull Request adds a time pause function to the UI for Presenter.

Motivation

https://x.com/_yuheiy/status/1851861256283795513

Because he wanted a timer stop feature on slidev and I wanted the same feature.

Reason for code change

- const now = useTimestamp({
-   interval: 1000,
- })
+ const { counter, reset, pause, resume } = useInterval(1000, { controls: true })

Hook was changed because it did not resume from the stop position when resumed.

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create-slidev

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@slidev/parser

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@slidev/types

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commit: 95450a0

[KermanX]

Thanks a lot!

In the latest commit I moved the composable to the composables directory, and updated the UI:

(When hovering the timer)