Auto merge of #24708 - szeged:webgpu-base, r=gterzian,kvark

Initial implementation of WebGPU API

<!-- Please describe your changes on the following line: -->
- Added the WebIDL bindings for GPU and GPUadapter interfaces.
- Created a background thread for WebGPU api calls.
- Established the async communication between the background thread and the WebGPU interfaces.
- Implemented the `requesAdapter` function of `navigator.gpu`

`./mach test-tidy` reports an error due to the different `arrayvec` version used in `servo` and `webgpu`, so added it to the ignore list in `servo-tidy.toml`

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes addresses a part of #https://github.com/servo/servo/issues/24706

<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

cc @jdm, cc @kvark

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/24708)
<!-- Reviewable:end -->

1 files changed, 4 insertions, 0 deletions

diff --git a/components/servo/lib.rs b/components/servo/lib.rs
index d201bc2d757..811a4a002d9 100644
--- a/components/servo/lib.rs
+++ b/components/servo/lib.rs
@@ -49,6 +49,7 @@ pub use servo_geometry;
 pub use servo_url;
 pub use style;
 pub use style_traits;
+pub use webgpu;
 pub use webrender_api;
 pub use webrender_traits;
 pub use webvr;
@@ -863,6 +864,8 @@ fn create_constellation(
 
     let resource_sender = public_resource_threads.sender();
 
+    let webgpu = webgpu::WebGPU::new();
+
     let initial_state = InitialConstellationState {
         compositor_proxy,
         embedder_proxy,
@@ -877,6 +880,7 @@ fn create_constellation(
         webrender_document,
         webrender_api_sender,
         webgl_threads,
+        webgpu,
         webvr_chan,
         webxr_registry,
         glplayer_threads,