feat: BCS ABNF compile-time generation

Cargo.toml

@@ -1,6 +1,8 @@
 [workspace]
 resolver = "2"
 members = [
+  "crates/iota-bcs-schema",
+  "crates/iota-bcs-schema-derive",
   "crates/iota-sdk",
   "crates/iota-sdk-crypto",
   "crates/iota-sdk-ffi",
@@ -42,6 +44,7 @@ thiserror = "2.0"
 tokio = "1.40.0"
 variadics_please = "1.1"
 
+iota-bcs-schema = { version = "0.1.0", path = "crates/iota-bcs-schema" }
 iota-crypto = { version = "0.0.1-alpha.1", package = "iota-sdk-crypto", path = "crates/iota-sdk-crypto", default-features = false }
 iota-graphql-client = { version = "0.0.1-alpha.1", package = "iota-sdk-graphql-client", path = "crates/iota-sdk-graphql-client", default-features = false }
 iota-graphql-client-build = { version = "0.0.1-alpha.1", package = "iota-sdk-graphql-client-build", path = "crates/iota-sdk-graphql-client-build", default-features = false }

crates/iota-bcs-schema-derive/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "iota-bcs-schema-derive"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "2", features = ["full"] }