Fix memory safety of native device

[Wybxc]

Fix #159.

See also: #162.

[ginnyTheCat]

Looks great! I tested this PR in my projects that use NativeDevice and it works well. Thanks for implementing this despite the changing requirements. I appreciate it a lot

Maybe @messense can have a look to see if I'm missing sth or if this is good to go.

[Copilot]

Pull Request Overview

This PR fixes memory safety issues in the native device implementation by changing how trait objects are handled and improving lifetime management. The changes address the referenced issue #159 and are related to issue #162.

Key changes:

• Added a 'static lifetime bound to the NativeDevice trait to ensure proper memory management
• Replaced mutable reference implementation with Box<T> for better ownership semantics
• Added Rc<RefCell<T>> implementation to enable shared ownership with interior mutability
• Updated test code to use the new Rc<RefCell<T>> pattern

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