Refactor winapi usage to windows-sys

[passcod]

Note

TWIR CFP - Difficulty: medium. Requires knowledge of Windows APIs and unsafe FFI handling.

The winapi crate, while not deprecated, hasn't received an update since 2020. This is because the windows and windows-sys crates have completely supplanted it.

Clearscreen has a bit of winapi code to write terminal escapes and configure the console:

https://github.com/watchexec/clearscreen/blob/main/src/lib.rs#L791-L821

While this code is stable, it would be a nice, self-contained refactor to move it to the windows-sys crate.

As part of this refactor, assess the unsafe usage in the new code, adding appropriate // SAFETY: comments. There is no need to audit the existing unsafe code as part of this task.

[ASamedWalker]

Hi, I am very interested in contributing to this issue. Although I am new to Rust and this would be my first time contributing to open-source, I am eager to learn and would greatly appreciate any guidance to help me address this task. While I will do my best to make progress promptly, I may require additional time and support to ensure the solution meets the project’s standards. Thanks

[passcod]

Sorry @ASamedWalker, #26 has already gotten there.