Add DirectX9Ex support

[super-continent]

This adds support for hooking DirectX9Ex, which is used in a few different programs that I want to work on using the crate (great work btw, thanks for maintaining something like this!) The code itself is mostly a copy of the current D3D9 code, with all the modifications needed to support the Ex variants of the hooked functions

[veeenu]

Thank you for your contribution! 🙌

Haven't looked it over in depth yet, but I wonder if there is a lot of code that's copied we might make this PR smaller by sharing common behavior rather than duplicating functions. This would help a lot with maintainability.

[super-continent]

This might be possible, the Present and Reset functions are the same as DX9 in this case. I'm unsure how to cleanly structure a merge like that though. An impl macro could work but that could end up being hard to read depending on how complex we need to make it

[veeenu]

Hi, sorry this took a while but I haven't really been able to spend any time working on open source lately 😓

Apparently IDirect3D9Ex implements Deref<Target=IDirect3D9>. Probably at least init_pipeline, render and reset_pipeline could be removed and called something like

use super::dx9::{render, init_pipeline, reset_pipeline);

  // later...
  if let Err(e) = render(&device.deref()) {
      error!("Render error: {e:?}");
  }

Could structure the module like

src/hooks/dx9/mod.rs
src/hooks/dx9/ex.rs

and remove those functions and PIPELINE and `RENDER_LOOP from your module. I'm sure there are other avenues I haven't considered yet.

Possibly also the harness could be deduplicated, but I'm not really worried about that. It's fine for it to stay duplicated.

[super-continent]

This should be a more maintainable version of the change.