Auto merge of #26872 - kunalmohan:gpu-canvas-context, r=kvark,jdm

Implement GPUSwapChain and GPUCanvasContext and interface with Webrender

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r?@kvark

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- [x] `./mach test-tidy` does not report any errors
- [ ] These changes fix #___ (GitHub issue number if applicable)

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Cargo.lock

@@ -832,6 +832,7 @@ dependencies = [
  "style_traits",
  "webgpu",
  "webrender_api",
+ "webrender_traits",
  "webxr-api",
 ]
 
@@ -6389,12 +6390,15 @@ name = "webgpu"
 version = "0.0.1"
 dependencies = [
  "arrayvec 0.5.1",
+ "euclid",
  "ipc-channel",
  "log",
  "malloc_size_of",
  "serde",
  "servo_config",
  "smallvec 0.6.13",
+ "webrender_api",
+ "webrender_traits",
  "wgpu-core",
  "wgpu-types",
 ]