pyfisch

Please rebase the PR. I wonder if it is possible to have a `Key` which implements `Copy` if T is `Copy` as well? I don't really like having separate types...

@madsmtm The docs need to used named key. ``` 74 | ...es to the phone’s main screen), use [`GoHome`][Key::GoHome]. | ^^^^^^^^^^^ no item named `Key` in scope ```

Renaming the `KeyState` variants will require consumers of this library to update quite a few lines of code. Since both the Web API and [libxkbcommon](https://xkbcommon.org/doc/current/group__state.html#ga631f03db07f30774659ab3f787b152e7) use the names "up" and...

> Still think there is value in the helper methods, but now I'm even more unsure what they should be called? Either `is_up` and `is_down` or we postpone the decision.