Display tessellation plans (3/4): display meshes from plans, GPU evaluation in the viewport (#805)

Display meshes are built from tessellation plans, with GPU evaluation in the viewport.

crates/gpu/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "solidcraft-gpu"
+description = "SolidCraft GPU compute: evaluates display tessellation plans (surface points and normals) in a compute shader"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+solidcraft-geom = { workspace = true }
+wgpu = { workspace = true }
+log = { workspace = true }
+thiserror = { workspace = true }
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+pollster = { workspace = true }
+# Native backends, so tests and the CLI can open a device without a window.
+wgpu = { workspace = true, features = ["metal", "vulkan", "dx12", "gles"] }
+
+[dev-dependencies]
+solidcraft-kernel = { workspace = true }