Add timeout for deep_sleep.prevent

**Describe the problem you have/What new integration you would like**
It would be useful to have an timeout option for deep_sleep.prevent action, so it would prevent deep sleep only for a given time.

**Please describe your use case for this integration and alternatives you've tried:**
The use case is quite simple: I want the touchscreen (and whole esp) to stay awake for x seconds after last touch, so every touch event invokes the deep_sleep.prevent. But in the current deep_sleep implementation it prevents sleeping until deep_sleep.enter is called.

**Additional context**
I've actually already implemented all the code required in local deep_sleep component (both python config, validation and cpp/h), tested it locally and it works quite well.

But wanted to consult the community / component maintainer if it is really needed and/or maybe there is some other solution in the current implemented I somehow missed.

Start by examining the deep_sleep component's Python configuration and validation alongside its C++ headers and source, focusing on deep_sleep.prevent and deep_sleep.enter. Confirm how the requested timeout should interact with repeated touch events and existing sleep behavior, then verify that the configured timeout works in the local implementation without changing the current no-timeout behavior.

Written by the indexing model from the issue text.