script: Move code generation and webidl files to new script_bindings crate. (#35157)

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

components/script_bindings/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "script_bindings"
+build = "build.rs"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+publish.workspace = true
+rust-version.workspace = true
+
+# https://github.com/rust-lang/cargo/issues/3544
+links = "script_bindings_crate"
+
+[lib]
+name = "script_bindings"
+path = "lib.rs"
+
+[build-dependencies]
+phf_codegen = "0.11"
+phf_shared = "0.11"
+serde_json = { workspace = true }
+
+[dependencies]
+style = { workspace = true }
+
+[features]
+webgpu = []
+webxr = []