gpu: add BindGroupEntry

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu/src/structs.zig

@@ -0,0 +1,17 @@
+//! Structures which are not ABI compatible with webgpu.h
+const Buffer = @import("Buffer.zig");
+const Sampler = @import("Sampler.zig");
+const TextureView = @import("TextureView.zig");
+
+pub const BindGroupEntry = struct {
+    binding: u32,
+    buffer: Buffer,
+    offset: u64,
+    size: u64,
+    sampler: Sampler,
+    texture_view: TextureView,
+};
+
+test "syntax" {
+    _ = BindGroupEntry;
+}